A={x|x≤-3或X>0}B={X|-4<X≤1}U=R 求AnB (CuA)UB An(CuB)(CuA)U(CuB) Cu(AUB)
问题描述:
A={x|x≤-3或X>0}B={X|-4<X≤1}U=R 求AnB (CuA)UB An(CuB)
(CuA)U(CuB) Cu(AUB)
答
AnB=(-4,-3]U(0,1]
(CuA) UB=(-4,1]
An(CuB)=(-无穷,-3]U(0,+无穷)
(CuA)U(CuB) =Cu(AnB)=(-无穷,-4]U(-3,0]U(1,+无穷)
Cu(AUB)=∅