设A={(x,y)|2x-y=1},B={(x,y)|5x+y=6},C={(x,y)|2x=y+1}
设A={(x,y)|2x-y=1},B={(x,y)|5x+y=6},C={(x,y)|2x=y+1}
设A={(x,y)|3x+2y=1},B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(x,y
1、设y=x+Inx,则dx/dy=() A、(x+1)/x B、(y+1)/y C、x/(x+1) D、y/(y+1)
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
已知x=1/y,则(x-1/x)(y-1/y)等于 A、2x² B、2y² C、x²+y&
设集合A={(x,y)|y^2=x+1}B={(x,y)|2y=4x^2+2x+5},C={(x,y)|y=kx+6}问
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
设U={(X,Y)}|X,Y属于R},A={(X,Y)Y-3/X-2=1},B=(X,Y)|Y=X+1},求CuA与B的
集合题 设A={(X,Y)|3X+2Y=1} B={(X,Y)|X-Y=2} C={(X,Y)|3X-3Y=5} 求A∩
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
已知集合A={(x,y)|ax+y=1},B={(x,y)}|x+ay=1},C={(x,y)|x²+y&su
设A={(x,y)|y=-2x+3,x,y∈R},B={(x,y)|y=(4m-3{m}^{2})x+1,x,y∈R},