x>0 y>0 2x+3y
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y)
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
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
x^3y+y^3-2x=0求导,
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
# define ABS_MOD(x,y) (((x) < 0) ((((x) % (y)) + (y)) % (y))
{2x+y/3-2y=0 2(2x+y)-5=7y
已知x^2-3y^2=2xy(x>0,y>0),求代数式x+2y/x-y
已知x>0 y>0 (2x+3y)(3x+2y)=75 求x+y的最小值.
设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值