实数x,y满足x-y-1≦0,x+y-3≦0,x≧1,则目标函数z=2x-y的最大值为 4.3.0.-1

已知实数x,y满足约束条件x+y>3,y 实数x,y满足{x-y+1>=0;y+1>=0;x+y+1 若实数x,y满足x-y+1》=0,x+y>=0,x 若实数x,y满足x-y+1>=0,x+y>=0,x 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 实数x,y满足:｜x+y｜ 已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围 实数x,y满足x^3-y^3-3xy=1,则x-y= 己知实数x,y满足{ (x-y+6) (x+y-6)>=0,1 已知实数x,y满足x^+y^+2x-2根号3y=0(1)x^+y^的最大值 （2）x+y的最小值 已知实数x,y满足{x=>0,y 已知实数x,y满足{x=>0,y 如果实数x,y满足x-4y+3 已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是 设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 实数x,y满足2x+5y>=0,2x-3y>=-6,2x+y