已知
,
.
(1)当
时,求
;
(2)若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f122079e0dfb739f84e9587b0e8ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cef2c70e6d68bd9f3784e18024770b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e05d5a1131f5903c29232699c7563b1c.png)
更新时间:2019-11-05 15:48:49
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