已知集合
,集合
,则集合
的非空真子集的个数为________ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72d48409f165bbc312ba1046015aadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d381490baa0956cf2bdd3b21a2a43397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
更新时间:2023-10-13 13:11:07
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