![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad858b39ef94d2c0a3fc2bd71c673e7.png)
更新时间:2021-11-04 10:21:40
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填空题-单空题
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较易
(0.85)
【推荐2】已知
,定义集合
之间的运算“*”:
,则集合
的所有子集的个数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720eb916b141426baf9daa911f45756b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0eb63b7f0e62fa9f899b353ec9cbb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f3109673f23ed331e9dba15d44d9776.png)
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