x+2=4x+5" role="presentation" style="border:0px; box-sizing:border-box...">
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So...
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So sánh \(A=\frac{2^{2016}+7}{2^{2014}+7}\)và \(B=\frac{2^{2013}+1}{2^{2011}+1}\)

2006+722004+7" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:20.34px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">2006+722004+7" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:20.34px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">A=22006+722004+72003+122001+1" role="presentation" style="border:0px; direction:ltr; display:inline-table; float:none; font-size:20.34px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">
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22 tháng 10 2017

     A= 3  - |2x - 1| 

         Mà |2x - 1| \(\ge\)0  \(\Rightarrow\)3 - |2x - 1| \(\le\)3

          Vậy MaxA = 3 \(\Leftrightarrow\)2x - 1 = 0

                                          \(\Leftrightarrow\)x = \(\frac{1}{2}\)  

Cho a,b∈R;n∈N∗a,b∈R;n∈N∗. Chứng minh...
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Cho a,b∈R;n∈N∗" role="presentation" style="border:0px; color:rgb(40, 40, 40); direction:ltr; display:inline-block; float:none; font-family:helvetica,arial,sans-serif; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; white-space:nowrap; word-wrap:normal" class="MathJax_CHTML mjx-chtml">a,bR;nN. Chứng minh rằng:

an+bn2≥(a+b2)n" role="presentation" style="border:0px; direction:ltr; display:inline-table; float:none; font-size:16.38px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; padding:1px 0px; position:relative; text-align:left; word-spacing:normal; word-wrap:normal" class="MathJax_CHTML mjx-chtml">an+bn2(a+b2)n
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