设X,Y满足约束条件{X-4Y

设X,Y满足约束条件X+Y 设x,y满足约束条件x-4y 设X,Y满足约束条件{X-4Y 设x,y满足约束条件{x>=0,y>=x,4x+3y 设x,y满足约束条件x>=0 y>=x 4x+3y 设变量x,y满足约束条件x-y>-1,x+y>1,3x-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x,y满足约束条件x>=0 x>=y 2x-y 设实数x,y满足约束条件：x>=2;y>=x;2x+y 已知x,y满足约束条件x-4y 设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2 设变量x,y满足约束条件:x-y+3>=0 x+y>=0 -2 设x,y满足约束条件x+y>=a,x-y 设x,y满足约束条件,x≧0,3x+4y≧4,y≧0,则x²+y²+2x的最小值为 设实数x和y满足约束条件,x+y≤10,x-y≤2,X≥4,则Z=2x+3y的最小值为? 设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y 满足约束条件(绝对值x)+2(绝对值y)