函数f（x）=x2﹣1对任意x∈[ 32 ，+∞），f（ xm ）﹣4m2f（x）≤f（x﹣1）+4f（m）恒成立，实数m取值范围

题干

函数f（x）=x²﹣1对任意x∈[

3

2

，+∞），f（

x

m

）﹣4m²f（x）≤f（x﹣1）+4f（m）恒成立，实数m取值范围（）

A：（﹣∞，﹣ $\frac{\sqrt{3}}{2}$ ∪ $\frac{\sqrt{3}}{2}$ ，+∞）

B：﹣1， $\frac{\sqrt{3}}{2}$

C：﹣ $\frac{\sqrt{3}}{2}$ ，2

D：﹣ $\sqrt{3}$ ， $\sqrt{3}$

上一题下一题 0.0难度选择题更新时间:2020-02-07 11:43:13

A

阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卷上将相应的字母编号涂黑。

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