已知函数
,
.
(1)当
时,求函数
的极值;
(2)已知
,求证:当
时,总有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3861fc1a50732d928467852a6bd8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa6aca1b0801e2ebf38631f2dfbe2b4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acda6b6464db27e1ec18a1522406d2.png)
更新时间:2022-04-27 16:19:37
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