解答题-问答题 较难0.4 引用2 组卷2110
已知函数
,(
为自然对数的底数).
(1)求函数
的最小值;
(2)若
对任意的
恒成立,求实数
的值;
(3)在(2)的条件下,证明:
.
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/923e00d21ec441c29317050a98867e54.png)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/58d6c896b8524fdca375511d70327569.png)
(1)求函数
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/b6f71a8a499242feb205f89cbbb38a12.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/95c82ac51a404e7ca5264b2dd533446a.png)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/78eb94bb88b2466e8cf0f40e2816a170.png)
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/7e3c7fb29abb4de9bfe4db22705f37c9.png)
(3)在(2)的条件下,证明:
![](https://img.xkw.com/dksih/QBM/2016/8/16/1572977835524096/1572977841635328/STEM/f16ba7d789a74aee990466a16fb2adde.png)
16-17高三上·宁夏银川·阶段练习
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