计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0)
计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);
计算:根号下X(X+Y)除根号下X+Y分之XY方
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]
根号下(x^2-2xy+y^2/xy)化简 x>y>0
若x>0,y>0,且x-根号下(xy)-2y=0,求2x-根号下xy′y+2根号下xy的值.
若x>0,y>0,且根号下x(根号下x+根号下y)=3根号下y(根号下x+5根号下y),求(2x+2根号下
已知y=根号下(x-4)+根号下(4-x)+3,求代数式(x-y+4xy/x-y)(x+y-4xy/x+y)?
(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.
已知x、y满足根号下4x-5y+根号下x-y-1=0,则根号下xy-根号下x/y
lim (x,y)->(0,0) xy/[根号下(xy+1)]-1的值为
lim (x,y)->(0,0) xy/[根号下(xy+1)]-1的值为
若X>0,y>0,且x-根号下xy-2y=0,求(2x-根号下xy)/y+2根号下xy的值