1 . 设集合
的充分条件,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc0637380d4cd3c1df73753bc9f568e.png)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572332135374848/1572332141199360/STEM/0865f059c87f4ae2b32957387106d7ff.png?resizew=13)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,若
是
的充分而不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd4510f8c4e900f221652bdd7f0abf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037d29525d118dc083dc3e5e808ca2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02475842a0c8318db41c5c38c3af7e66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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3 . 已知集合A=
,B={x|x+m2≥1}.命题p:x∈A,命题q:x∈B,并且命题p是命题q的充分条件,求实数m的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/1/7/1572423440408576/1572423446216704/STEM/64097edc68594780ab6b10646798cb44.png)
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13-14高三上·安徽池州·阶段练习
4 . 若“
”是“
”的充分不必要条件,则
的最大值是
![](https://img.xkw.com/dksih/QBM/2014/1/6/1571461102559232/1571461107458048/STEM/80a39ccd5cc44827977c4c0e72fd5d5a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/6/1571461102559232/1571461107458048/STEM/394988c872a341a0846e69e61164d2e4.png)
![](https://img.xkw.com/dksih/QBM/2014/1/6/1571461102559232/1571461107458048/STEM/c43c3273a7604bd5ad33a38c5f83a88f.png)
A.2011 | B.2012 | C.2013 | D.2015 |
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20-21高二上·江苏·单元测试
5 . 已知
:
,
:
,若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803df069a176c3767aded58255ad6e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7357046665d9986f4b21c102c45eca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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20-21高一上·浙江·阶段练习
解题方法
6 . 已知
,
(Ⅰ)当
,“
”是“
”的充分不必要条件,求a的取值范围;
(Ⅱ)当
时,
,求a的取值范围;
(Ⅲ)若
,且A,B,C中至少有一个不是空集,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8673fa544fdbc5935324a72522137a91.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3eb5935678e432e6f1f3180bfdb3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959f3c514abb15185a429e1b2f1674e5.png)
(Ⅲ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e631eb268821e9cb3c1b8ad50801594c.png)
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