A={y|y=(x-1)^2,x≤0},B={y|y=x^2-x+1,x∈R},A与B关系

已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 A={y|y=(x-1)^2,x≤0},B={y|y=x^2-x+1,x∈R},A与B关系 A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0 已知集合A={(x,y)|2x-y+2>=0,x-2y+1 方程组{ X+Y=1 X-Y=2a }的解满足 {x>0 y 集合A={（x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0 已知x属于R,y>0,集合A={x|x*x+x+1,-x,-x-1},集合B={-y,-y/2,y+1}若A=B,则x*x+y*y的值为 已知集合A=｛（x,y)|y≤根号1-x²｝ 集合B｛（x,y)|(y-x)(y+x)≤0｝求所覆盖的图形面积 设平面点集A={(x,y)|(y-x)(y-1/x)>=0},B={(x,y)|(x-1)^2+(y-1)^2 设平面点集A={(x,y)|(y-x)(y-1/x)>=0},B={(x,y)|(x-1)^2+(y-1)^2 设平面点集A={(x,y)|(y-x)(y-1/x)>=0},B={(x,y)|(x-1)^2+(y-1)^2 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 设x大于1,y大于0,x^y+x^-y=2根号二,x^y-x^-y等于? A={(X,Y)|X+Y>=1},B={(X,y)|X^2+y^2=1},B={(X,y)|X^2+y^2 假设集合U={(x,y)|x∈R,y∈R },A={(x,y)|2x-y+m>0},B={(x,y)|x+y-n 已知集合M=｛y｜y=-x^2+1,x∈R｝,N=｛y｜y=x^2,x∈R｝,全集I=R,则M∪N等于( )?A.｛(x,y)｜x=±二分之根号二,y=二分之一,x,y∈R｝B.｛(x,y)｜x≠±二分之根号二,y≠二分之一,x,y∈R｝C.｛y｜y≤0,或y≥1｝D.｛ 设集合A={(x,y)|y≥|x-2|,x≥0}B={(x,y)|y≤-x+b}.若(x,y)∈A∩B,且x+2y的最大值为9,求b的值. 集合A={(x,y)｜｜x｜≤1,｜y｜≤1},B={(x,y)｜(x-a)^2+(y-a)^2