定义在（0， π2 ）上的函数f（x），f′（x）是它的导函数，且恒有f（x）＜f′（x）tanx成立，则_刷题宝

题干

定义在（0， π

2

）上的函数f（x），f′（x）是它的导函数，且恒有f（x）＜f′（x）tanx成立，则（）

A： $\sqrt{3}$ f（ $\frac{π}{4}$ ）＞ $\sqrt{2}$ f（ $\frac{π}{3}$ ）

B：f（1）＞2f（ $\frac{π}{6}$ ）•sin1

C： $\sqrt{2}$ f（ $\frac{π}{6}$ ）＞f（ $\frac{π}{4}$ ）

D： $\sqrt{3}$ f（ $\frac{π}{6}$ ）＞f（ $\frac{π}{3}$ ）

上一题下一题 0.0难度选择题更新时间:2017-08-24 05:40:41

答案(点此获取答案解析）

B

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