(2014•安徽模拟)已知实数x,y满足线性约束条件x−y+2≥0x+y−4≥02x−y−5≤0,目标函数z=y-ax(
(2011•绵阳二模)已知x,y满足线性约束条件:x−2y+3≥02x+y−9≤02x+6y−9≥0,若目标函数z=-x
(2012•安徽模拟)实数对(x,y)满足不等式组x−y−2≤0,x+2y−5≥0,y−2≤0,若目标函数z=kx-y在
(2014•文登市二模)已知变量x,y满足约束条件x+y≥2x−y≤20≤y≤3,若目标函数z=y+ax仅在点(5,3)
(2012•浙江模拟)已知实数x,y满足约束条件2x−y≤0x−3y+5≥0y≥1
(2013•青岛二模)设变量x、y满足线性约束条件x+y≥3x−y≥−12x−y≤3,则目标函数z=log7(2x+3y
(2012•安徽模拟)已知实数x,y满足x−2y+2≥0y≥|x|
已知x,y满足约束条件x−y+5≥0x+y≥0x≤3,则z=x+2y的最小值为( )
变量x,y满足约束条件x+y≥2,x-y≤2,0≤y≤3,若目标函数z=y-ax仅在点(5,3)处取最小值,则实数a的取
已知实数XY满足约束条件x-ax-1≥0,2x+y≥0,x≤1,(a∈R)目标函数z=x+2y只有当x=1,y=0时取得
(2011•佛山二模)设x,y满足约束条件2x+y−6≥0x+2y−6≤0y≥0,则目标函数z=x+y的最大值是( )
已知实数x,y满足x≥0y≤12x−2y+1≤0.,若目标函数z=ax+y(a≠0)取得最小值时最优解有无数个,则实数a
设变量x,y满足约束条件x+y≥3x−y≥−1,则目标函数z=y+2x的最小值为( )