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Đề tuyển sinh vào 10 các trường THPT chuyên tỉnh Quảng Nam năm học 2014-2015 <a href="https://www.blogger.com/null" name="more" style="background-color: white; color: #004d99; font-family: Verdana, Geneva, sans-serif; font-size: 12px; line-height: 18px;"></a> <a href="https://www.blogger.com/null" name="more" style="background-color: white; color: #004d99; font-family: Verdana, Geneva, sans-serif; font-size: 12px; line-height: 18px; text-decoration: none;"></a> Câu 1. a/ Cho <span aria-readonly="true" class="MathJax" id="MathJax-Element-35-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-359" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 11.917em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.25em 1000.003em 3.522em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-361" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a<span class="mo" id="MathJax-Span-362" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span style="-webkit-transition: none; border: 0px; clip: rect(1.176em 1000.003em 2.781em -0.491em); left: 54.015625px; margin: 0px 0px 0px -3.207em; padding: 0px; position: absolute; top: -3.022em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-365" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1<span class="mo" id="MathJax-Span-366" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mo" id="MathJax-Span-367" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-370" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">6<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span class="mo" id="MathJax-Span-371" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-374" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span class="mo" id="MathJax-Span-375" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.472em -0.491em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-378" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-379" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-382" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -1.849em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.917em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.028em 1000.003em 4.633em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.781em -0.491em); left: 54.015625px; margin: 0px 0px 0px -3.269em; padding: 0px; position: absolute; top: -1.417em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.472em -0.552em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-386" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">6<span class="mo" id="MathJax-Span-387" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-388" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">4<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-391" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -1.849em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.287em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.028em 1000.003em 4.633em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span class="mo" id="MathJax-Span-392" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+<span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.472em -0.552em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-395" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span class="mo" id="MathJax-Span-396" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-397" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-400" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.373em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.682em; margin: 0px; padding: 0px; position: absolute; top: -1.849em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 2.287em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.028em 1000.003em 4.633em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 6.67em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 4.087em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.662em; width: 0px;">. Tính giá trị biểu thức <span aria-readonly="true" class="MathJax" id="MathJax-Element-36-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-401" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 12.349em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 9.139em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.596em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-403" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">M<span class="mo" id="MathJax-Span-404" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span class="mo" id="MathJax-Span-405" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">(<span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-407" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">a<span class="mn" id="MathJax-Span-410" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-411" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mi" id="MathJax-Span-412" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">a<span class="mo" id="MathJax-Span-413" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-414" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">1<span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-416" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span class="mn" id="MathJax-Span-419" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2014<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.838em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> b/Cho <span aria-readonly="true" class="MathJax" id="MathJax-Element-37-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-420" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-422" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-423" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-424" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.004em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> là các số nguyên dương và <span aria-readonly="true" class="MathJax" id="MathJax-Element-38-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-425" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.448em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.275em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-428" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-431" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-432" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-433" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span class="mi" id="MathJax-Span-434" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.588em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> là số chính phương. Chứng minh rằng <span aria-readonly="true" class="MathJax" id="MathJax-Element-39-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-435" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 3.769em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.781em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-438" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-441" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-442" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mi" id="MathJax-Span-443" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.588em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> bằng tổng 2 số chính phương. Câu 2. a/ Giải phương trình sau: <span aria-readonly="true" class="MathJax" id="MathJax-Element-40-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-444" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 18.769em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 13.892em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 3.028em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 36.015625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-447" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.534em -0.491em); left: 36.015625px; margin: 0px 0px 0px -2.157em; padding: 0px; position: absolute; top: -1.664em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.41em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-451" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-452" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-453" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">1<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.299em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span class="mo" id="MathJax-Span-454" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">+<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-457" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span class="mo" id="MathJax-Span-458" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mi" id="MathJax-Span-459" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 1.299em -0.552em); left: 0.559em; margin: 0px; padding: 0px; position: absolute; top: -1.602em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.299em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.059em; width: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(3.275em 1000.003em 4.324em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;">√<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 4.448em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span class="mo" id="MathJax-Span-460" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.41em -0.491em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-463" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span class="mo" id="MathJax-Span-464" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-465" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span class="mi" id="MathJax-Span-466" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-467" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-469" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-472" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(3.583em 1000.003em 4.077em -0.552em); left: 0.991em; margin: 0px; padding: 0px; position: absolute; top: -4.688em; transition: none; vertical-align: 0px;">−−−−−−−−−<span style="-webkit-transition: none; border: 0px; clip: rect(2.966em 1000.003em 4.571em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.071em; transition: none; vertical-align: 0px;">√<span class="mo" id="MathJax-Span-473" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span class="mn" id="MathJax-Span-474" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">1<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.337em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.996em; width: 0px;"> b/ Giải hệ phương trình: 
<div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;">
<span class="MathJax" id="MathJax-Element-41-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><span class="math" id="MathJax-Span-475" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 15.497em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 11.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.978em 1000.003em 5.312em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -3.886em; transition: none; vertical-align: 0px;">{<span style="-webkit-transition: none; border: 0px; clip: rect(2.287em 1000.003em 5.25em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -4.009em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.552em); left: 83.015625px; margin: 0px 0px 0px -5.12em; padding: 0px; position: absolute; top: -2.836em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.534em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-483" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mn" id="MathJax-Span-486" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-487" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-488" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span class="mi" id="MathJax-Span-489" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-490" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-491" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span class="mi" id="MathJax-Span-492" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mi" id="MathJax-Span-493" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-494" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-495" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">4<span class="mi" id="MathJax-Span-496" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-497" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span class="mn" id="MathJax-Span-498" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">0<span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.491em); left: 83.015625px; margin: 0px 0px 0px -4.812em; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-502" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-505" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span class="mo" id="MathJax-Span-506" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-507" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">3<span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-509" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-512" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-513" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span class="msubsup" id="MathJax-Span-514" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.534em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-515" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mn" id="MathJax-Span-518" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span class="mo" id="MathJax-Span-519" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span class="mi" id="MathJax-Span-520" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-521" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-522" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 4.254em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -1.746em; width: 0px;"></div>
 Câu 3. Cho các hàm số <span aria-readonly="true" class="MathJax" id="MathJax-Element-42-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-523" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 8.83em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 6.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.719em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-525" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-526" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 8.515625px; margin: 0px 0px 0px -0.429em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-529" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-530" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 8.515625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.787em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-531" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.052em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span class="mi" id="MathJax-Span-532" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-533" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">+<span class="mn" id="MathJax-Span-534" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">2<span class="mi" id="MathJax-Span-535" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">m<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.921em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.579em; width: 0px;"> và <span aria-readonly="true" class="MathJax" id="MathJax-Element-43-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-536" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 5.929em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.386em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.052em 1000.003em 2.781em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-538" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-539" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 8.515625px; margin: 0px 0px 0px -0.429em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-542" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">−<span class="mn" id="MathJax-Span-543" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">3<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 8.515625px; margin: 0px 0px 0px -0.182em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mn" id="MathJax-Span-544" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">4<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.052em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span class="msubsup" id="MathJax-Span-545" style="-webkit-transition: none; border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.546em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-546" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mn" id="MathJax-Span-549" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">2<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.921em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.662em; width: 0px;"> lần lượt có các đồ thị <span aria-readonly="true" class="MathJax" id="MathJax-Element-44-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-550" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-552" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-553" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">d<span class="mo" id="MathJax-Span-554" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> và <span aria-readonly="true" class="MathJax" id="MathJax-Element-45-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-555" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-557" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-558" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span class="mo" id="MathJax-Span-559" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;">. Với giá trị nào của m thì <span aria-readonly="true" class="MathJax" id="MathJax-Element-46-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-560" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-562" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-563" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">d<span class="mo" id="MathJax-Span-564" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> cắt <span aria-readonly="true" class="MathJax" id="MathJax-Element-47-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-565" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-567" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-568" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">P<span class="mo" id="MathJax-Span-569" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> tại 2 điểm phân biệt bên phải trục tung? Câu 4. Cho tam giác nhọn <span aria-readonly="true" class="MathJax" id="MathJax-Element-48-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-570" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 3.09em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.287em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-572" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-573" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-574" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> và điểm <span aria-readonly="true" class="MathJax" id="MathJax-Element-49-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-575" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-577" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> bất kì trong tam giác, qua <span aria-readonly="true" class="MathJax" id="MathJax-Element-50-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-578" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-580" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> vẽ các tia vuông góc với <span aria-readonly="true" class="MathJax" id="MathJax-Element-51-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-581" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-583" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-584" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">, <span aria-readonly="true" class="MathJax" id="MathJax-Element-52-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-585" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-587" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mi" id="MathJax-Span-588" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">,<span aria-readonly="true" class="MathJax" id="MathJax-Element-53-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-589" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-591" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-592" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> lần lượt cắt các cạnh đó tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-54-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-593" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.386em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.213em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-595" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">D<span class="mo" id="MathJax-Span-596" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-597" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">E<span class="mo" id="MathJax-Span-598" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-599" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">F<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;">. Trên các tia <span aria-readonly="true" class="MathJax" id="MathJax-Element-55-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-600" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 7.596em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-602" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span class="mi" id="MathJax-Span-603" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">D<span class="mo" id="MathJax-Span-604" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-605" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">G<span class="mi" id="MathJax-Span-606" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">E<span class="mo" id="MathJax-Span-607" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-608" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">G<span class="mi" id="MathJax-Span-609" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">F<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> lấy các điểm <span aria-readonly="true" class="MathJax" id="MathJax-Element-56-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-610" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 5.435em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.015em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-613" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mo" id="MathJax-Span-614" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span class="mo" id="MathJax-Span-615" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-617" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mo" id="MathJax-Span-618" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span class="mo" id="MathJax-Span-619" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-621" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mo" id="MathJax-Span-622" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.588em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> sao cho <span aria-readonly="true" class="MathJax" id="MathJax-Element-57-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-623" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 10.682em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 7.904em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.929em 1000.003em 2.781em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.361em 1000.003em 2.349em -0.491em); left: 11.515625px; margin: 0px 0px 0px -0.614em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-627" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-629" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mo" id="MathJax-Span-630" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 8px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 11.515625px; margin: 0px 0px 0px -0.491em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-632" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-633" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.423em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span class="mo" id="MathJax-Span-634" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.349em -0.491em); left: 11.515625px; margin: 0px 0px 0px -0.614em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-637" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-639" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mo" id="MathJax-Span-640" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 8px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 11.515625px; margin: 0px 0px 0px -0.491em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-642" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mi" id="MathJax-Span-643" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.423em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span class="mo" id="MathJax-Span-644" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span style="-webkit-transition: none; border: 0px; clip: rect(1.423em 1000.003em 2.349em -0.491em); left: 12.515625px; margin: 0px 0px 0px -0.676em; padding: 0px; position: absolute; top: -2.59em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-647" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-649" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mo" id="MathJax-Span-650" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 8px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border: 0px; clip: rect(1.485em 1000.003em 2.349em -0.552em); left: 12.515625px; margin: 0px 0px 0px -0.491em; padding: 0px; position: absolute; top: -1.725em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-652" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-653" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span style="-webkit-transition: none; border: 0px; clip: rect(0.806em 1000.003em 1.238em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -1.293em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 1.546em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: 0.003em; width: 0px;"><span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 2.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.662em; width: 0px;">. Gọi <span aria-readonly="true" class="MathJax" id="MathJax-Element-58-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-654" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.929em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-656" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">H<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> là điểm đõi xứng của <span aria-readonly="true" class="MathJax" id="MathJax-Element-59-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-657" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.423em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.052em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-660" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mo" id="MathJax-Span-661" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> qua <span aria-readonly="true" class="MathJax" id="MathJax-Element-60-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-662" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-664" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. a/ Chứng minh <span aria-readonly="true" class="MathJax" id="MathJax-Element-61-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-665" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 6.546em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 4.818em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.176em 1000.003em 2.596em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-667" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">H<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-669" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mo" id="MathJax-Span-670" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span class="mo" id="MathJax-Span-673" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">/<span class="mo" id="MathJax-Span-676" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">/<span class="mi" id="MathJax-Span-677" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-679" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mo" id="MathJax-Span-680" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.588em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;">. b/ Chứng minh <span aria-readonly="true" class="MathJax" id="MathJax-Element-62-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-681" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.114em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.806em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-683" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">G<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> là trọng tâm <span aria-readonly="true" class="MathJax" id="MathJax-Element-63-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-684" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.262em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.151em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.114em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-687" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mo" id="MathJax-Span-688" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-690" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mo" id="MathJax-Span-691" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-693" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mo" id="MathJax-Span-694" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">′<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. Câu 5. Cho tam giác nhọn <span aria-readonly="true" class="MathJax" id="MathJax-Element-64-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-695" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 3.09em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.287em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-697" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-698" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-699" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. Đườnng tròn <span aria-readonly="true" class="MathJax" id="MathJax-Element-65-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-700" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-702" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-703" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">O<span class="mo" id="MathJax-Span-704" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> đk <span aria-readonly="true" class="MathJax" id="MathJax-Element-66-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-705" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-707" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-708" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> cắt cạnh <span aria-readonly="true" class="MathJax" id="MathJax-Element-67-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-709" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.694em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-711" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-712" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mo" id="MathJax-Span-713" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-714" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-715" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> lần lượt tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-68-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-716" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.781em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-718" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">E<span class="mo" id="MathJax-Span-719" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-720" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">D<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.338em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;">; <span aria-readonly="true" class="MathJax" id="MathJax-Element-69-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-721" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-723" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-724" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">D<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> cắt <span aria-readonly="true" class="MathJax" id="MathJax-Element-70-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-725" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-727" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span class="mi" id="MathJax-Span-728" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">E<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-71-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-729" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.929em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-731" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">H<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">, <span aria-readonly="true" class="MathJax" id="MathJax-Element-72-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-732" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.287em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-734" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-735" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">H<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> cắt <span aria-readonly="true" class="MathJax" id="MathJax-Element-73-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-736" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.546em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-738" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-739" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">C<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-74-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-740" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 0.744em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.559em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.552em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-742" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">I<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. Vẽ các tiếp tuyến <span aria-readonly="true" class="MathJax" id="MathJax-Element-75-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-743" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 5.25em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.892em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-745" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-746" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">M<span class="mo" id="MathJax-Span-747" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-748" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-749" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">N<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> của đường tròn <span aria-readonly="true" class="MathJax" id="MathJax-Element-76-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-750" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-752" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-753" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">O<span class="mo" id="MathJax-Span-754" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> a/ Chứng minh <span aria-readonly="true" class="MathJax" id="MathJax-Element-77-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-755" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.929em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-757" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">H<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> là tâm đường tròn nội tiếp <span aria-readonly="true" class="MathJax" id="MathJax-Element-78-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-758" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.843em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 2.102em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-760" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">D<span class="mi" id="MathJax-Span-761" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">E<span class="mi" id="MathJax-Span-762" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">I<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. b/ Chứng minh 3 đường thẳng <span aria-readonly="true" class="MathJax" id="MathJax-Element-79-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-763" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 7.966em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 5.867em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-765" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">M<span class="mi" id="MathJax-Span-766" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">N<span class="mo" id="MathJax-Span-767" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-768" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">B<span class="mi" id="MathJax-Span-769" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">D<span class="mo" id="MathJax-Span-770" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-771" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">C<span class="mi" id="MathJax-Span-772" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">E<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> đồng quy. Câu 6. Trong hệ trục tọa độ <span aria-readonly="true" class="MathJax" id="MathJax-Element-80-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-773" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.534em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.855em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-775" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">O<span class="mi" id="MathJax-Span-776" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mi" id="MathJax-Span-777" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> có đường thẳng <span aria-readonly="true" class="MathJax" id="MathJax-Element-81-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-778" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 10.497em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 7.781em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.429em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mo" id="MathJax-Span-780" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-781" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">d<span class="mo" id="MathJax-Span-782" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span class="mo" id="MathJax-Span-783" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">:<span class="mi" id="MathJax-Span-784" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-785" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">=<span class="mn" id="MathJax-Span-786" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.312em; position: static; transition: none; vertical-align: 0px;">2014<span class="mo" id="MathJax-Span-787" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">−<span class="mi" id="MathJax-Span-788" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.25em; position: static; transition: none; vertical-align: 0px;">x<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> cắt trục trục <span aria-readonly="true" class="MathJax" id="MathJax-Element-82-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-789" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-791" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">O<span class="mi" id="MathJax-Span-792" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-83-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-793" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.052em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.744em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-795" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">, <span aria-readonly="true" class="MathJax" id="MathJax-Element-84-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-796" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.793em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.299em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-798" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">O<span class="mi" id="MathJax-Span-799" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">y<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;"> tại <span aria-readonly="true" class="MathJax" id="MathJax-Element-85-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-800" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 1.052em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 0.744em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.299em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-802" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.088em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;">. Một điểm <span aria-readonly="true" class="MathJax" id="MathJax-Element-86-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-803" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 4.509em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 3.336em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.596em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-805" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">M<span class="mo" id="MathJax-Span-806" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">(<span class="mi" id="MathJax-Span-807" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">x<span class="mo" id="MathJax-Span-808" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">;<span class="mi" id="MathJax-Span-809" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">y<span class="mo" id="MathJax-Span-810" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">)<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.504em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.413em; width: 0px;"> di động trên đoạn <span aria-readonly="true" class="MathJax" id="MathJax-Element-87-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-811" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.04em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.485em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.349em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-813" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mi" id="MathJax-Span-814" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">B<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.171em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.079em; width: 0px;"> (không trùng với <span aria-readonly="true" class="MathJax" id="MathJax-Element-88-Frame" role="textbox" style="background-color: white; border: 0px; color: #444444; direction: ltr; display: inline; float: none; font-family: Arial; font-size: 12px; line-height: 18px; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; white-space: nowrap; word-wrap: normal;"><span class="math" id="MathJax-Span-815" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 2.596em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 1.917em;"><span style="-webkit-transition: none; border: 0px; clip: rect(1.238em 1000.003em 2.534em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-817" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">A<span class="mo" id="MathJax-Span-818" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px;">,<span class="mi" id="MathJax-Span-819" style="-webkit-transition: none; border: 0px; display: inline; font-family: MathJax_Math-italic; margin: 0px; padding: 0px 0px 0px 0.188em; position: static; transition: none; vertical-align: 0px;">B<span style="-webkit-transition: none; border-left-style: solid; border-width: 0px 0px 0px 0.004em; display: inline-block; height: 1.421em; margin: 0px; overflow: hidden; padding: 0px; position: static; transition: none; vertical-align: -0.329em; width: 0px;">), tìm GTNN của biểu thức: 
<div aria-readonly="true" class="MathJax_Display" role="textbox" style="background-color: white; border: 0px; color: #444444; font-family: Arial; font-size: 12px; line-height: 20.399999618530273px; margin: 1em 0em; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; position: relative; text-align: center; width: 620px;">
<span class="MathJax" id="MathJax-Element-89-Frame" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; padding: 0px; text-align: left; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><span class="math" id="MathJax-Span-820" style="-webkit-transition: none; border: 0px; display: inline-block; margin: 0px; padding: 0px; position: static; transition: none; vertical-align: 0px; width: 18.769em;"><span style="-webkit-transition: none; border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; transition: none; vertical-align: 0px; width: 13.892em;"><span style="-webkit-transition: none; border: 0px; clip: rect(0.867em 1000.003em 3.522em -0.491em); left: 0.003em; margin: 0px; padding: 0px; position: absolute; top: -2.157em; transition: none; vertical-align: 0px;"><span class="mi" id="MathJax-Span-822" style="-webkit-transition: none; 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XEM ĐIỂM THI VÀO LỚP 10 TẠI TỈNH QUẢNG NAM</div>
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<div class="title_qc" style="color: #00495c; font-family: Arial; font-weight: bold; margin: 0px 0px 10px; padding: 0px;">
SOẠN TIN: HBD  34 sốbáodanh gửi<a href="sms:8785?body=DTM [m%C3%A3 t%E1%BB%89nh] [s%E1%BB%91 b%C3%A1o danh]" style="background-color: #ec0303; background-image: linear-gradient(rgb(236, 3, 3) 0%, rgb(250, 15, 15) 100%); border-bottom-left-radius: 5px; border-bottom-right-radius: 5px; border-top-left-radius: 5px; border-top-right-radius: 5px; color: white; font-size: 20px; font-weight: bold; margin: 0px; padding: 4px 10px; text-decoration: none;">8785</a></div>
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Trong đó: 34 là mã tỉnh của Tỉnh Quảng Nam; Số báo danh: Là số báo danh bạn cần xem điểm.</div>
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Ví dụ: Bạn là thí sinh ở Tỉnh Quảng Nam và có số báo danh là 123456.</div>
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Để xem điểm thi của bạn, soạn tin: HBD dấu cách 34 dấu cách 123456, gửi 8785</div>
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Chú ý: Ngay từ bây giờ, bạn có thể gửi tin nhắn. Chúng tôi sẽ gửi kết quả điểm thi về điện thoại của bạn ngay khi kết quả được cập nhật.</div>
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Chúc bạn thi đạt kết quả cao nhất trong kỳ thi <a href="http://thivaolop10.blogspot.com/" style="color: #004d99; text-decoration: none;" target="_blank">tuyển sinh lớp 10 năm 2014</a>!</div>
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