X.Y满足,2X-Y>=0.Y>=X.Y>=-X+B,且Z=2X+Y的最小值为3则B的值为多少rt

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 正数x,y满足x-y=2xy,求x-y/x+y的值. 变量x,y满足x-2y=0,x 设x.y满足条件y>=0.X-Y+1>=0.x+y-3 实数x.y满足x平方+y平方-2x+4y=0.则x-2y的最大值 若x.y满足x^2+4x+y^2-10y+29=0.求x+y的值 已知x,y满足x+y-2>=0,2x-y+2>=0,x 设实数x,y满足 x>=0 x-2y>=0 x-y-2 设实数x,y满足约束条件：x>=2;y>=x;2x+y 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 设x,y满足约束条件x>=0 x>=y 2x-y 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 当x、y满足x>=0,y>=x,2x+y+k