设全集为实数R,A={2x平方-7x+3≤0},B={x|x平方+a

设全集为实数R,A={2x平方-7x+3≤0},B={x|x平方+a 设全集是实数集R,A={X|2X.X-7X+3 设全集是实数集R,A={x|2x^2-7x+3 设全集是实数集R,A={X|1/2≤X≤3},B=｛X|X+a 设全集是实数集R,A={X|1/2≤X≤3},B=｛X|X+a 设全集R.A={X/3 设全集为R,A={x|-3 设全集为R,A={x|-2 设全集为R,A={x | x的平方-5x-6>0} 设全集是实数集R,A={X|1/2≤X≤3},B={X|X2 a 设全集是实数集R,A={x|y=√7x-2x∧2-3},B={x|x∧2+a 设全集是实数R,A={x|2x^2-7x+3≤0},B={x|x^2+a 设全集是实数集R,A=｛x丨2x²-7x+3≤0｝,B=｛x丨x²+a 设全集为R,集合A=[1/2,3],B={x|x^2+a 设全集为实数集,集合A={x||x| 设全集U=R,集合A={x|x平方+3x+2=0},B={x|x平方+(m+1)x+m=0}若a∩b=b,求实数m的值 设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a 设全集是实数集R,A={X|2x^2-7x+3≤0},B={X|y^2+a