已知全集u={1,2,3,4,5,6,7,},A={2,4,5},B={1,3,5,7}求(CuA)U(Cu B) , (CuB)∩（CuB),Cu（A∩B)Cu（A∪B)

分类: 作业答案 • 2021-12-19 12:02:16

问题描述：

已知全集u={1,2,3,4,5,6,7,},A={2,4,5},B={1,3,5,7}求(CuA)U(Cu B) , (CuB)∩（CuB),Cu（A∩B)
Cu（A∪B)

答

(CuA)U(Cu B)={1,3,6,7}U{2,4,6}={1,2,3,4,6,7}
(CuB)∩（CuB)={2,4,6}
Cu（A∩B)={1,2,3,4,6,7,}，
Cu（A∪B)={6}

答

已知全集U=｛1,2,3,4,5,6,7｝,A=｛2,4,5},b=｛1,3,5,7｝求An(CuB)n（CuB).

答

CuA=U-A={1,3,6,7} CuB=U-B={2,4,6}
(CuA)U(CuB)={1,2,3,4,6,7}
(CuA)∩(CuB)={6}
Cu(A∩B)=(CuA)U(CuB)={1,2,3,4,6,7}
Cu(AUB)=CuA∩CuB={6}

答

CuA={1,3,6,7} CuB={2,4,6} 所以(CuA)并(CuB)={1,2,3,4,6,7} (CuA)（题打错了吧）交(CuB)={6} A交B={5},所以Cu(A交B)={1,2,3,4,6,7} A并B={1,2,3,4,5,7},所以
Cu(A并B)={6}