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)

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}