y=x(3-2x) (0
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y)
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
如果分式3x-6y/x+y=0,那么x,y 应满足 A、x=2y B、x≠-y C、x=2y且x≠-y D、x=2y且y
计算下列分段函数 f(x,y)=2x^2+3x/x+y (x>0,y>0)
高等数学中的对x求导设F(x,y)={x^3-y^3/x^2+y^2,(x,y)不等于(0,0) ;f(x,y)=0,(
x^3y+y^3-2x=0求导,
已知:|x+二分之一|+(y-3)的平方=0,求:代数式(3x+2y)的平方-2(x-y)(x+y)=3(x+y)(x-
已知3x²+xy-2y²=0(x≠0,y≠0),求x/y-y/x-x²+y²/x