1 . 已知函数
.
(Ⅰ)讨论函数
的单调区间;
(Ⅱ)当
时,设
的两个极值点
,
恰为
的零点,求
的最小值.[
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/964203793c0d4f01a7fdd38fc7b3a9a2.png)
(Ⅰ)讨论函数
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/9f102b00eebf45a992b4696afbee70d9.png)
(Ⅱ)当
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/c1f6005d36874a339e70ff8dea580c03.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/6403895269e64659ade561d3a6cb4417.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/83e27315dd9a40ffb460141d7d6ad2ce.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/73f9960c7f5e4ef286eadb17d7b389c8.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/0c93200d1d384d6aace5152a21f9d99d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572535615561728/1572535621885952/STEM/b634468df549427c9ef64338a6ed93c8.png)
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2016-12-04更新
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2卷引用:2017届四川双流中学高三文必得分训练9数学试卷