已知函数
,若对任意
,总存在
,使
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381c4de6d99a43ef1f2efd2c4d3711d8.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2019-11-19 14:30:12
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