设全集I=R,A={X/X=t方-2t-3},b={y/y=-2x方-8x+4}求A交B, A并BA会求, B怎么求?

设全集I=R,A={X/X=t方-2t-3},b={y/y=-2x方-8x+4}求A交B, A并BA会求, B怎么求? 设全集I=R,A={x|x=t^2-2t-3},B={y-2x^2-8x+4},求A交B,A并B 要过程 设全集U=R,集合A={X|X方-X-6 设全集R,A=X 设全集R.A={X/3 设全集I=R,A={x|x>3},B={x|x 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 设全集U=R,A{x|2 设全集为R,A={x|-2 设全集U=R,集合A={x|x=-t^2,t∈R},B={y|y=5+|a|,a∈R},则Cu（A∪B）等于什么 全集I=R,集合A={x x=-t2+2t,t∈R}B={y y=-x2+2x+1,x∈R}则GIA∩B= 设全集U=R,集合A=x|x 设全集U=R,集合A={X|X 设全集U=R,集合A={X//X/ 设全集U=R,A={x|1/x 设全集U=R,A={x|x