已知
,其中
是自然常数,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd411600ba615fd7b2292e7379dbf76.png)
(1)当
时,求
的单调性和极值;
(2)若
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c73a7e2a122836c447fd25a05b1e267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd411600ba615fd7b2292e7379dbf76.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dd18467feea8eb478f4669a32c2d57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2017-10-07 10:16:41
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适中
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【推荐1】已知函数
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【推荐2】已知函数
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【推荐1】已知函数
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