x^2+2xy+y^2-根号3x-根号3y+12=0求xy最小值
x^2+2xy+y^2-根号3x-根号3y+12=0求xy最小值
x^2-2xy+y^2-根号3x-根号3y+12=0求x+y的最小值
已知正实数x y满足x-根号xy-2y=0求 x+3根号xy+2y/2x-2根号下xy-y
设x>0,y>0,且根号x(根号x+根号y)=3根号y(根号x+5根号y),求代数式2x+根号xy+2y\x-根号xy-
已知X—根号3XY-4Y=0,求(2X+3根号XY-2Y)/(3X-根号XY+Y)的值
已知x-2 根号xy - 15y = 0 ,求 2x+ 根号xy +3y╱x+根号xy - y
已知根号x(根号x-根号y)=根号xy+3y,求(3x-y)分之2x+3倍根号xy-y 的值
已知y=根号1-x+根号x-1+3,求根号x+根号y分之x+2根号xy+y+根号x-根号y分之一的值
已知x平方+y平方-2y+1=0,求(根号x+根号y+3)/((根号xy+y)(3根号x+根号y))
设根号x(根号x-根号Y)=根号xY+3Y,求2x+3根号xY/3X-Y的值
已知x,y为正数,且根号x(根号x+根号y)=3根号y(根号x+5根号y),求:(2x+根号xy+3y)/(x+根号xy
若x>o,y>o,且根号x(根号x+根号y)=3根号y(根号x+5根号y)求x+根号xy分之2x-根号xy-5y