1:设全集U=R,A={x|x≥2},B={x|x0},则B∩（CUA)= 2:已知全集U=R,B={X|-1

设全集U=R,A={x|x+1≥0},B={x|x 设全集U=R,A={x|x-1≥0},B={x|1- 设全集U=R,A={x/x>1},B={x/x+a 设全集U=R,A={x|x>1},B={x|x+a 设全集U=r,A{x|x>1} B{x|x+a 设全集U=R,A={x|1/x 设全集U=R+,集合A=｛x|x≥2｝,集合B=｛x|1 设全集U=R,A={X||X-1|>2},B={X|X²-6X+8 设全集U=R,集合A={X|-1 设全集U=R,集合A={x|-1 设全集U=R,集合A={x/1 设全集U=R,A={x|-1 设全集U=R,集合A=(x|-1 设全集U=R,集合A={x|-1 设全集U=R,集合A=（X|-1 设全集U=R,A={x|2 设全集U=R,集合A={x|-2 设全集U=R,A={x|-2