B
bibobibobobo
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
CM : [TEX]2 ^ (\frac{1}{cos^2x}).\sqrt{y^2-y+\frac{1}{2}}[/TEX]\leq 1
( 2 mũ [TEX]\frac{1}{cos^2x}[/TEX] ak )
( 2 mũ [TEX]\frac{1}{cos^2x}[/TEX] ak )
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