已知函数
,
.
(1)当
时,求
的极值;
(2)令
,求函数
的单调减区间;
(3)如果
是函数
的两个零点,且
,
是
的导函数,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360752e24839d54558ae38c46a06fbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214c44b61831f68b857a8f814c723dff.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a7533a4247b6142471b600fc103b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963d3a81bb34bec111275419b650d74d.png)
更新时间:2016-12-04 00:29:10
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