根号1/x^2-根号1/y^2=(x-y)/xy图
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
【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy-
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))
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(根号x-根号y)=?
根号2x-y-8+根号x+2y+1=0 求xy.
已知y根号[(x-1)/y]=负根号[(x-1)y],求xy的取值范围,并化简根号[2xy-(x^2+1)y]
先化简,在求值:(x+根号xy)/(y+根号xy)+((根号xy)-y)/(x-根号xy),其中x=根号3+1,y=根号
(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.
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)
【内有图片】 已知x=根号2+1,y=根号2-1,求代数式x-根号xy分之x-2倍根号xy+y的值.
若实数x,y满足x根号(1-x)=根号(y-2)+根号(x-1),求3x²+xy-y²/x²