已知集合
,
.
(1)若
,求
;
(2)若集合
不是空集,且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5d3c68b7b77498089253bd9db069e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df2371d12c952ed412c5bebfcef7356.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-10-24 08:34:07
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适中
(0.65)
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解题方法
【推荐1】已知集合
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(1)当
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(2)求使
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【推荐2】已知:
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(1)求
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【推荐3】已知集合
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(1)若
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51fd0510546b44e22e1c05a6a604c0.png)
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(1)若
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【推荐2】(1)设集合
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67ddb5315b1e16763fcfeb6b1abb65b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
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