(10分)若集合S=,且S∩T=,P=S∪T,求集合P的所有子集. 解: ∴ 的子

(10分)若集合S=且S∩T=,P=S∪T,求集合P的所有子集.

解:

的子集有:                                                          .

答案

解:由S=且S∩T=    (2分)

,而S=(4分)当时,

 即满足S∩T=(6分 当时,

不满足S∩T=(8分)所以那么的子集有:

   (10分)

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