设全集为R,已知A={x丨-2<x<3},B={x²+2x-8>0},M={x丨x²-4ax+3a≤
设全集为R,已知A={x丨-2<x<3},B={x²+2x-8>0},M={x丨x²-4ax+3a≤
已知集合A={x丨x^2-2x-8≤0},B={x丨x^2-(2m-3)x+m^2-3m≤0,m∈R},设全集为R,若A
设全集为R,A={x|2x²-7x+3≤0},B={x|x²+a<0}
(1)设全集为R,A={X丨X-1丨<4},B={X丨X²-2X≥0},求ANB,AUB,AnCB
题是:已知全集U=R,集合A={x|x^2-x-6<0},B={x|x^2+2x-8>0},C={x|x^2-4ax+3
设全集是实数R,A={x丨2x²-5x-3≤0},B={x丨x²+a
设全集是实数集R,A={x丨2x²-7x+3≤0},B={x丨x²+a
设全集是实数集R,A={x|2x²-7x+3≤0},B={x|x²-a<0}.
设全集为R,集合A={x|-1<x<3},B={x|x<-2},求:
设全集为R,A={x|2x²-7x+3≤0},B={x|x²+a<0} (1)若a=-4,求A∩
设全集是实数集R,A={x|1/2≤x≤3},B={x|x²+a<0}
设全集是实数集R,A={x丨2x-7x+3≤0},B={x丨x+a<0}[1]当a=-4时,求A∩B和A∪B