解题方法
1 . 已知函数
.
(1)若
在
上单调递增,求a的取值范围;
(2)当
时,设
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570b6f9a08be03589c8ac5fc4e06d0b4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459d4fd718865a67559c3b6a179b8ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8152c197cf4b13a50e64b463401888.png)
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2 . 已知函数
.
(1)若
,证明:
;
(2)若
有两个不同的零点,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6832e36232df491cb74747c7f0e91228.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ae6d5e25c5bc3afe1ca6d86c219a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d96955796f392b93bfe98e749a0578d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
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