对数难题设X=(1/2)lg5,Y=(1/5)1g2 A X-Y>0 B X-Y

设平面点集A={(x,y)|(y-x)(y-1/x)>=0},B={(x,y)|(x-1)^2+(y-1)^2 设A={(x,y)|y^2-x-1=0},B={(x,y}|4x^2+2x-2y+5=0),C={(x,y)|y=kx+ 设集合A={(x,y)|y^2-x-1=0},B={(x,y)|4x^2-2x-2y+5=0},C={(x,y)|y=k 设A={(x,y)│y^2-x-1=0},B={(x,y)│4x^2+2x-2y+5=0},C={(x,y)│ y=kx 设集合A={(X,Y) / ay²-x-1=0},B={(x,y) / 4x²+2x-2y+5=0} 设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于 三角函数难题!设x∈[0,pi] ,y∈[0,1],试求函数f(x,y)=(2y-1)sin(x)+(1-y)sin(( 设集合A={(X,Y)/Y=X^2+AX+2} B={(X,Y)/Y=X+1,0 设集合A={(x,y)|y=x^2+ax+2},B={(x,y)|y=x+1,0 设集合A={(x,y) / y=x平方+ax+2 } B={(x.y) / y=x+1,0 设A={(x,y)|y=x平方+2x+5｝,B={(x,y)|y=ax+1｝,问： 集合题 设A=｛(X,Y)|3X+2Y=1} B={(X,Y)|X-Y=2} C={(X,Y)|3X-3Y=5} 求A∩