1 . 选修4-5:不等式选讲
已知
,不等式
的解集为
.
(1)求
;
(2)若不等式
有解,求
的取值范围.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4b650331dcf7825db6d5ace210a7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc6d8acdd4244dc03f2bdc117c6ba30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19d56d901c4ebbab8bebd8a9eeeda1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-04更新
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