若x2+4y2=(x+2y)2+A=(x-2y)2+B,则A,B各等于( )
若x2+4y2=(x+2y)2+A=(x-2y)2+B,则A,B各等于( )
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
若A{(X,Y)|Y=x2-2},B{(X,Y)|X=Y2-2},求A∩B
圆A:x2+y2+4x+2y+1=0与圆B:x2+y2-2x-6y+1=0的位置关系是( )
x2-xy-2y2-x-7y-6=(x-2y+A)(x+y+B).求A、B的值.
设x、y∈R,集合A={(x,y)|x2-y2=1},B={(x,y)|y=t(x+2)+3},若A∩B为单元素集,则t
A=4x2-2xy+4y2,B=3x2-6xy+3y2,且|x|=3,y2=16,|x+y|=1,求4A+[(2A-B)
集合A={(x,y)| y=x2}.B={(x,y)| y=x+2},A交B等于
若圆x2+y2+ax+by+c=0与圆x2+y2=1关于直线y=2x-1对称,则a-b=( )
直线y=ax(a>0)与双曲线y=5/x交于A(x1,y1),B(x2,y2)两点,则4x1y2-2x2y1等于多少?
抛物线y=2x^2上两点A(x1,y1),B(x2,y2)关于直线y=x+m对称且x1*x2=-½,则m等于
设集合A={x||x-2|≤2,x∈R},B={y|y=-x2},则CR(A∩B)等于多少