1 . 已知函数
.
(1)当
时,用定义证明函数
在定义域上的单调性;
(2)若函数
是偶函数,
(i)求
的值;
(ii)设
,若方程
只有一个解,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2057c7e6ee7d535ff671dd07a6f847c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(ii)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd4135f09e8d6771ef2d3ae05fea30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8bfb563f79688d136e0cb958b5153c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 已知函数
.
(1)判断
的单调性并写出证明过程;
(2)当
时,关于x的方程
在区间
上有唯一实数解,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458c6ac03943fafecc972712f01864c7.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d113a273d12bc3b37d78c5a6f42b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aae9c8988f4a48db69cad3308942c9.png)
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