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1 . 已知函数
,
.
(1)求
的最小值
;
(2)若
在
上有零点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa19cd5c9606baabc9a45194548f217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58119f48aa8860923d1f13dd78a17c62.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aae9c8988f4a48db69cad3308942c9.png)
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2 . 关于x的不等式
在
上恒成立,则实数m的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020bee54b5e13a41d799935daa069961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4070a103d4d37b0abf30070eaf76b962.png)
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