实数x,y满足x^3-y^3-3xy=1,则x-y=

实数x,y满足x的三次方-y的三次方-3xy=1则x-y= 若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于? 已知实数xy满足x2-x+y=3则x+y的最大值是 基本不等式.急若正实数x,y满足2x+y=xy,则2x+3y的最小值为? 若x,y是实数,满足√1-3x+√3x-1+y=6,则xy= 已知正实数xy满足x+y=1,求1/(2x+y) +4/(2x+3y)最小值 x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y 实数x、y满足方程x^2+2y^2-2xy+x-3y+1=0,则y的最大值为? 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 若两个正实数x,y满足x^2+2xy-3y^2=0,求x^2+xy+y^2/x^2-xy+y^2 已知实数x,y,满足x-√x-1=√y+3-y,则x+y最大值是? 若实数xy满足x-y 1≥0,x y≥0,x≤0,则z=3“x 2y的最小值是多少