解题方法
1 . 已知全集
,集合
.
(1)当m=3时,求
与
;
(2)若
,求实数m的取值范围;
(3)若
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0cc850bfcc9fda6acb02ba1201283c.png)
(1)当m=3时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af09495d81ee34290ead354fd05cdafe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b76d9080172609503a3daa3e245b80b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
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名校
2 . 已知函数
.
(1)求不等式
的解集;
(2)若关于
的不等式
有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e610592205d02cb3feef90b1dbecd2.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e2e9a16f693f595d3260c1471cb161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知不等式
的解集为
,关于
的不等式
的解集为
,全集
,
求使
的实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70cab10c54ab57eabcdc2a93f5bac59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6483cfdac3ce09a94d740839ce9e2e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b534fa138e12ca1d30654d91cc244b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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