已知实数x,y满足：1

已知实数x、y满足-1 已知实数x,y满足：1 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 已知实数x,y满足：y 已知实数X,Y满足2 已知实数xy满足x+2y 已知实数x、y满足-4 已知实数xy满足 x+y-2 已知实数x,y满足-4 已知实数x,y满足约束条件x+y>3,y 已知正实数x,y满足(x-1)(y+1)=16,x+y最小值是 已知实数x,y满足y=|x-1|,则x+2y的最大值是 已知实数x,y满足y=|x-1|若x+2y 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 已知实数x,y满足{x=>0,y 已知实数x,y满足{x=>0,y 已知实数x.y满足(x+2)^2+y^2(