(2012•湛江模拟)已知实数满足条件,x≥0y≥1x−y+1≥0
(2012•安徽模拟)已知实数x,y满足x−2y+2≥0y≥|x|
(2012•浙江模拟)已知实数x,y满足约束条件2x−y≤0x−3y+5≥0y≥1
(2014•湛江二模)已知实数x、y满足不等式组x≥0y≥02x+y≤2,且ax+by≤1,(a>0,b>0)恒成立,则
已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是
已知实数x,y满足条件{2x-y+1≥0,2x+y≥0,x≤1,求z=x+3y的最小值.
若实数x,y满足条件0≤x≤10≤y≤22y−x≥1
已知实数x,y满足条件2x+y≥3x+y−3≤0x≥0y≥0
(2012•浙江模拟)若实数x,y满足不等式组x−2y+5≥03−x≥0x+y≥0,则z=x+2y的最小值是( )
(2012•道里区三模)已知x,y满足条件x≥0x−y+2≥02x+y−5≤0
(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
(2012•商丘二模)设实数x,y满足不等式组y+x≤1y−x≤1y≥0
(2012•黄州区模拟)设实数x,y满足约束条件2x−y+2≥08x−y−4≤0x≥0,y≥0