设全集U={-2,-1,0,1,2,3},子集A={2,a,a+4} B={0,a+b,b}如果3∈A∩B,则Cu(A∪B)___________
问题描述:
设全集U={-2,-1,0,1,2,3},子集A={2,a,a+4} B={0,a+b,b}如果3∈A∩B,则Cu(A∪B)___________
答
a=-1 b=3
A={2,-1,3}
B={0,2,3}
Cu(A∪B)={1,-2}