Question

已知全集U={1,2,3,4,5,6,7,8},A={2,4},B={1,2,5}则A在U中的补集=(),B在U中补集=

Answer 1

A在U中的补集={1,3,5,6,7,8}

B在U中的补集={3,4,6,7,8}

A∩B={2}

所以,Cu(A∩B)={1,3,4,5,6,7,8}