设A={（x,y)|y=1-3x,x、y∈R},B={（x,y)|y=(k-2k^)x-k,x、y∈R},当A∩B=￠时,k的取值是?答案是3/2 为什么是这个数啊?

设A={(x,y)/x+y 设x.y满足条件y>=0.X-Y+1>=0.x+y-3 设集合A={x|x=y^2-2y-8},B={x|y=-x^2+2x+3},C={y|y+1 设M={(x,y)||x|+|y| 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设A={（x,y)│x+y 设集合A={(X,Y)|X+Y 设集合A={(x,y)||x|+|y| 设A={（x,y)│x+y 设A={（x,y)│x+y 设集合A={(x,y) | |x|+|y| 设集合A={(x,y) | |x|+|y| 设y(x)=(1+x^3)(5-1/x^2),求y'(1),y'(a).把步骤写清,跪拜设y(x)=(1+x^3)(5-（1/x^2）),求y'(1),y'(a). 设集合A=｛y/y=x²-2x+3,x∈R｝,B=｛y/y=-x²+2x+10,x∈R｝,求A∩B设集合A=｛（x,y)/y=x+1,x∈R｝,B=｛（x,y)/y=-x²+2x+3/4,x∈R｝,求A∩B 设A={(x,y)}|3x+2y|.设A={(x,y)}|3x+2y|.B={(x,y)|x-y=2|},C={(x,y)|2x-2y|=3},D={(x,y)|6x+4y=2|},求A∩B,B∩C,A∩D设A={(x,y)|3x+2y=1}.B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(x,y)|6x+4y=2},求A∩B，B∩C，A∩D 设x大于1,y大于0,x^y+x^-y=2根号二,x^y-x^-y等于? 设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y