已知全集U={1,2,3,4,5,6,7,8},A={2,4},B={2,3,8,}求CuAUB (补集的意思),CuA∩CuB.
问题描述:
已知全集U={1,2,3,4,5,6,7,8},A={2,4},B={2,3,8,}求CuAUB (补集的意思),CuA∩CuB.
答
U={1,2,3,4,5,6,7,8},A={2,4},B={2,3,8}
则A∪B={2,3,4,8}
所以Cu(A∪B)={1,5,6,7}
CuA={1,3,5,6,7,8}
CuB={1,4,5,6,7}
所以(CuA)∩(CuB)={1,5,6,7}