名校
解题方法
1 . 已知
,
.
(1)
在定义域上是严格增函数,求实数a的取值范围;
(2)当
时,求函数
的值域;
(3)已知常数
,不等式
对任意
恒成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c224293ff8bd74c4bfbc0faf6c66374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a981aa485843b0c1c197937a1400d026.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3939a88348b902cd6417c106ce8f279a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecc70df44c7dae5330a2dcdb8a690cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b823aaf4eeeaf94427535085b8dd5d7.png)
(3)已知常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a40142c84be68ee2918c3a8303388c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bac4071b66db5286e489da94a5410cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272b6bd583160d4c3a5e58445daae1be.png)
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