已知集合
,集合
或
,集合
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6db7770a50ae2d290409e15a95b319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a884b4f8abcd59336c71e5429fa75fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a8f1824ab762a29a8c9fd7a9ae0f23.png)
A.集合![]() |
B.![]() |
C.![]() |
D.![]() ![]() |
更新时间:2022-07-20 18:37:08
|
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单选题
|
较易
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【推荐1】已知集合
,
,则
的真子集个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a426d9ddd02ff0fdfd6be1a54f276988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fd6e5b2140c30b66d2fdad6ae191cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
单选题
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较易
(0.85)
解题方法
【推荐2】已知集合
,则
的子集个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00384532db7a81b55291622250d2d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.4 | B.8 | C.16 | D.18 |
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单选题
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较易
(0.85)
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【推荐1】若“
”是“
”的充分不必要条件,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99014752eade3650bffe9d905ee523a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d57674f36bf5c1f8098d80be12a310.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次