若x,y满足约束条件 x+y≥1 x-y≥-1 2x-y≤2 目标函数z=ax+2y仅在点（1,0）处取得最小值,则a的取值范围

设X,Y满足约束条件X+Y 已知变量x,y满足约束条件1 已知x,y满足约束条件1 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若变量x y满足约束条件{x+y 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 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 若实数x,y满足约束条件x-y≥0,x+y≥0,2x+y≤1,则y/(x+1)的最大值是多少, 已知x,y满足约束条件x+y==-1,y>=1 若0= 已知实数x,y满足约束条件x+y>3,y 若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 若变量x y满足约束条件x+y≤5 x-y≤-1 x≥0 则z=3x-2y的最小值 设变量x y满足约束条件x-y≥-1 x+y≥1 2x-y≤1 z=(x-2y)/(x+y)的最大值 满足约束条件(绝对值x)+2(绝对值y) x、y满足的约束条件0