设U={X|X是小于9的正整数},A={1,2,3},B={3,4,5,6},则CUA∩CuB
问题描述:
设U={X|X是小于9的正整数},A={1,2,3},B={3,4,5,6},则CUA∩CuB
答
U={1,2,3,4,5,6,7,8},
所以CUA={4,5,6,7,8}
CUB={1,2,7,8}
CUA∩CuB={7,8}