设全集U=R,A={x|-1

问题描述:

设全集U=R,A={x|-1

(1)A=(-1,5],B=(-无穷,3)U[15,+无穷)
所以CuA=(-无穷,-1]U(5,+无穷)
(2)AUB=(-无穷,5]U[15,+无穷)
Cu(AUB)=(5,15)