对于集合M,N,定义
且
,设全集
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab183e9c2036ca417a0d29637186be6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a6069a63489a8619b6886168196944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5a6bf9fc3a5785ace42150649905ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd9dc105e8699c8b577ed522f148f53.png)
A.![]() | B.M的非空真子集个数为7 |
C.![]() | D.![]() |
更新时间:2022-11-14 12:29:14
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【推荐1】设全集为R,在下列条件中,满足
的充要条件的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】我们知道,如果集合
,那么
的子集
的补集为
且
,类似地,对于集合
我们把集合
且
,叫作集合
和的差集,记作
,例如:
,则有
,
,下列解答正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952f1e0ce5bd53a6d5e8bb07ea2da5f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1945d96a455764ecb7ea67cd5abf6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20669b603d86512154d7c91a44007e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5988bf315a64166f60f5e83ee63dc44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bb7c317f907cd7fda5ae49b24f2d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9e460c144f7a2141d2df0308b125f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbd3b4eb846d642053a1bbb6ebda5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba65dcb8c4db3a6ebdc9fa2007bfb3e.png)
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A.已知![]() ![]() |
B.已知![]() ![]() ![]() ![]() ![]() |
C.如果![]() ![]() |
D.已知全集、集合![]() ![]() ![]() ![]() |
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解题方法
【推荐1】已知
表示集合
的整数元素的个数,若集合
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ce3d3a37b19f5b648fe70397b2ce69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a500f2bd84c1f61d56bfb1ddcf6bea26.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知A,B为集合,定义
,则下列命题中为真的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afdce60669e71e09b0cce322810d21dd.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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