题目内容

已知全集I{xx23x2≥0}A{xx1x3}B{xx≤1x2},求UAUBABAB,(UAUB),U(AB.

 

答案:
解析:

I{xx23x2≥0}{xx≤1x≥2}.

A{xx1x3}B{xx≤1x2}.UA{xx12≤x≤3},

UB{xx2}{2},ABA{xx1x3},AB{xx≤1x2}B,

(UA)∩UB)=UAB)={2}.

 


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