已知函数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ed99a74e126a05cb520f19c094020.png)
(Ⅰ)求函数的极值;
(Ⅱ)若对任意,都有
成立,求实数
的取值范围.
更新时间:2017-07-19 22:48:12
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