设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x 只需要第五题

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x+y 设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x 只需要第五题 设变量x.y满足条件3x+2y 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 设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y 已知变量xy满足约束条件x+2y-3 设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3 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（ ）. 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=2x+3y的最小值为为什么我每次都算出6啊 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 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? 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? 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