设全集U={1,2,3,4,5,6,7},A={2,4,5,7},B={3,4,5},定义A*B={x∈U|x∉A或x∉
设全集U=R,A={X||X|>2},B={X|X^2-4X+3
设全集U为R,已知A=(xl1<x<7),B=(xlx<3或x>5),求A并B,A交B,A关于全集U
设全集U=R,A={x|x^2-5x-6>0},B={x||x-5|
设全集U=R,A={x/2x的平方-7x+3≤0},B={x/x的平方+a<0} (1)a=-4时求A∩B、A∪B
设全集U={X∈正整数|X≤8},若A交B的补集={2,8},A的补集并B的补集={1,2,3,4,5,6,7,8,}求
设全集U={x|x≤8,且x属于N},A={3,4,5},B={4,7,8},求:(1)CuA交B;(2)Cu(A交B)
设全集为U,A={x||2x+1|≤3},B={x|-x^2+2x
设全集U=R,A={x|x≤1或x≥3},B={x|k
1.设全集U={x|-1≤x≤5 x∈Z},集合A{A|(x-1)(x-2)=0 x∈R},集合B={x|4-x/2>1
设全集U=R,集合A={x|-1≤x<3},B={x|2x-4≥x-2}.
设全集为R,集合A={x | |x-1| ≥2 },B={x |x>1},A U B、A U B、Cu A、Cu B分别
已知全集U={1,2,3,4,5,6,7,8},A={x|1≤x≤5},x∈Z},B={x|2<x<9,x∈Z}.