(2013•成都二模)已知集合{(x,y)|2x+y−4≤0x+y≥0x−y≥0}
(2013•成都二模)已知集合{(x,y)|2x+y−4≤0x+y≥0x−y≥0}
(2013•成都二模)已知集合{(x,y)|,2x+y−4≤0x+y≥0x−y≥0,}表示的平面区域为Ω,若在区域Ω内任
(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
(2013•烟台一模)已知实数x,y满足不等式组2x−y≥0x+2y≥03x+y−5≤0,则2x+y的最大值是( )
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
(2012•唐山二模)设变量x、y满足x+y≥1x−y≥02x−y−2≤0,则目标函数z=2x+y的最小值为( )
已知实数x,y满足2x+y−2≥0x−2y+4≥03x−y−3≤0则x
(2009•汕头二模)已知Ω={(x,y)|3x+y≤4,x≥0,y≥0},A={(x,y)|x≤y},若向区域Ω内随机
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( )
(2012•南京二模)已知变量x,y满足约束条件x+y≥2x−y≤1y≤2
(2012•商丘二模)设实数x,y满足不等式组y+x≤1y−x≤1y≥0
已知x−y+2≥0x+y−4≥02x−y−5≤0