设xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y

设xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y 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 已知xy满足约束条件y=2 2X+y 设xy满足约束条件,1≤x,x+y≥2,y≥3x-6,则z=2x+y最小值 设xy满足约束条件x≥0,x≥y,2x-y≤1,求z=3x+2y的最大值 xy满足约束条件x-ay-1>=0,2x+y>=0,x 设变量xy满足约束条件x+y≥3,x-y≥-1,2x-y≤3,则目标函数z=x2+y2的最大值为 设X,Y满足约束条件X+Y 设xy满足约束条件x-ay≤2 x-y≥-1 2x+y≥4 若z=x+y既有最大值又有最小值设xy满足约束条件x-ay≤2 x-y≥-1 2x+y≥4 若z=x+y既有最大值又有最小值 求实数a范围 设实数x,y满足约束条件：x>=2;y>=x;2x+y 设x,y满足约束条件x>=0 x>=y 2x-y 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 已知变量xy满足约束条件x+2y-3 一道线性规划题设变量XY满足约束条件x-y≥-1,x+y≥1,2x-y≤1.则目标函数z=x-2y/x+y的最大值为? xy满足约束条件x-ay-1>=0,2x+y>=0,x-1/2 a》0或a0 设变量xy满足约束条件x-y≥0,x+y-2≥0,3x-y-6≤0则目标函数z=2x-y设变量xy满足约束条件x-y≥0,x+y-2≥0,3x-y-6≤0则目标函数z=2x-y的最小值为（ ）.