已知函数
(
是自然对数的底数)
(1)设
(其中
为
的导数),求
的极小值;
(2)若对
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9fde001ef6d55a27e4a3ea7390c151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0900642509853376f5100dfe6baff871.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b71b0c86aefb7f7f1f2c87e180504c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7994bbcf39f4dda34e877b21af71f103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52805938232a4b74d8b483bb68288c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2021-03-31 22:45:23
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