设全集U={不大于9的正整数},A={2,3,4} ,B={3,4,5,6},求A∪B,CuA∩CuB
问题描述:
设全集U={不大于9的正整数},A={2,3,4} ,B={3,4,5,6},求A∪B,CuA∩CuB
答
A∪B={2,3,4,5,6}
CuA∩CuB=Cu(A∪B)={1,7,8,9}