已知全集
,集合
,
,则集合
的子集个数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4f59a3fd052f229e79e5aefa517913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97927627b6890964c516f02dc34ed2f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a0ae48f89d6a1c5ddfff1f41fcbb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7f860e8f0503c476eaf0bd73a71810.png)
更新时间:2020-02-19 20:47:18
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【推荐2】已知集合A中有n个元素,则集合A的子集个数有_____ 个,真子集有_____ 个,非空真子集_______ 个.
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解题方法
【推荐1】设全集
,集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a666a7ff85c6ae0d1ea9da87c8060c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3af8f8343bdc47f1305e1d7c441ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e233ce5403bc46468a1ddf0ad4a6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a666a7ff85c6ae0d1ea9da87c8060c.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
名校
【推荐2】已知全集
,集合
,
,那么
=___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf226667132bd86a8662e6ad7676f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f9137aeaf0e16deb9be93fb492027a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbe031d8f10142347f4bfa260de167c.png)
您最近一年使用:0次