Question

已知U=R,集合A=(-1,4),集合B=[0,5],求CuA,CuB？

Answer 1

U=R,A=(-1,4),B=[0,5]
CuA
=R- A
={ x| x≤-1 or x≥4 }
CuB
=R -B
={ x| x<0 or x>5 }