已知函数
.
(1)当
时,求不等式
的解集;
(2)若不等式
有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95526e731231e3ac0736f4e3ba956aa.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4cc9bd1e16993b98cdb6849ac68083.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d827354d2da92159b4047f55a0ed175f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-02-19 13:40:07
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解题方法
【推荐1】已知
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【推荐2】若设
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(1)若
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
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