已知x>y>0,xy=1,求证(x^2+y^2)/(x-y)≥2根号2
已知x>y>0,xy=1,求证(x^2+y^2)/(x-y)≥2根号2
已知x>y,且xy=1,求证:(x2+y2/x-y)≥2根号2
x>y>0,xy=1,求证:(x^2+y^2)/x-y)>=2倍根号2
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))
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
已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值
已知:x>0,y>0,x-2y=根号xy.求(x+(根号xy)+y)/(x-(根号xy)-y)
已知y=根号(x-8)+根号(8-x)+18,求代数式[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)
已知x>0,y>0且x+y=1,求证根号(x+1/2)+根号(y+1/2)
已知x,y是正实数,且xy-x-y=1,求证x+y≥2+√2
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y