设变量x y满足{x+y ≥1,x—y ≥0,2x—y—2 ≥0}则目标函数z=2x+y的最小值

设变量x,y满足x+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x-y≥-1 x+y≥1 2x-y≤1 z=(x-2y)/(x+y)的最大值 设变量x.y满足条件3x+2y 设变量x,y满足约束条件 {x-y≥0,x+y≤1,x+2y≥0},则函数Z=2x+y 的最大值? 设变量x,y满足约束条件 {x-y≥0,x+y≤1,x+2y≥0},则函数Z=2x+y 的最大值? 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2x+y≤2,x≥y,y≥-1,则z=-y+3x的最大值为? 设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3 设z=2x+y式中变量x,y同时满足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,y满足x大于等于1,y 已知变量x,y满足约束条件1 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{x+y ≥1,x—y ≥0,2x—y—2 ≥0}则目标函数z=2x+y的最小值 设变量X,Y满足|X|+|Y|小于等于1,则X+2Y的最大值和最小值分别为