已知下面三个集合①{x│y=x^2+1}②{y│y=x^2+1}③{(x,y)│y=x^2+1}
已知集合A={(x,y)|x≥1y≤1x-y≤2}
已知集合①P={y=x^2+1},②Q={y|y=x^2+1},③E={x|y=x^2+1},④F={(x,y)|y=x
已知集合A={(x,y)| (y-3)/ (x-1)=2,x,y∈R},B={(x,y)| 4x+ay=16,x,y∈
已知4x=9y求(1)x+y/y (2)y-x/2x
若全集I={(x,y)|x,y∈R},集合M={(x,y)|(y-3)/(x-2)},N{(x,y)|y=x=1},则(
已知集合P={(x,y)|y=2x^2+3x+1,-2
已知集合A ={y \y =2~x ,x
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
集合N={(x,y)|(x-1)^2}+(y-1)^20},M={(x,y)|x^2+y^2
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
设全集U={(x,y)│x,y∈R},集合M={(x,y)│y-3/x-2=1},N={(x,y)│y≠x+1},求Cu
设全集U={(x,y)│x∈R,y∈R},集合A=={(x,y)│y-3/x-2=1},B={(x,y)|y≠x+1},