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>-1,x+y>1,3x-y 设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y 设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 设变量x,y满足约束条件y≤x,x+y≥2,y≥3x-6,则目标函数z=2x+y的最小值 已知变量x,y满足约束条件1 设变量x,y满足约束条件2x+y≤2,x≥y,y≥-1,则z=-y+3x的最大值为? 已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x,y满足约束条件x+2y-3=0,y-1 设X,Y满足约束条件X+Y 设变量x.y满足约束条件=> 1)x+y>=3 2)x-y>=-1 3)2x-y我靠哦.没人会么 设变量X,Y满足约束条件：Y>=X,X+2Y=-2,则Z=X-3Y的最小值是多少 设变量满足约束条件x+y≥3,x-y≥-1,2x-y≤3,则目标函数z=2x+2y最小值? 设变量满足约束条件x+y≧3,x-y≧-1,2x-y≦3,则目标函数z=2x+2y最小值 已知变量x满足约束条件1：x-y+2=1；3:x+y-7