设m为实数，若{(x，y)|x−2y+5≥03−x≥0mx+y≥0⊆{(x，y)|x

设m为实数，若{(x，y)|x−2y+5≥03−x≥0mx+y≥0⊆{(x，y)|x 设实数x、y满足不等式组x+2y-5＞02x+y-7＞0x≥0，y≥0，若x、y为整数，则3x+4y的最小值是（　　） 设实数x，y满足约束条件x≥1且x≠2y≥1x+2y−5≤0，则z＝x+y−1x−2的取值范围为（　　） 若实数x，y满足y≥1y≤2x−1x+y≤m. 设实数x，y满足x−y−2≤0x+2y−5≥0y−2≤0 若实数x，y满足x≥1x+y≤4x−2y+c≤0 设变量x，y满足约束条件x−y≥0x+y≤1x+2y≥1 设实数x,y满足不等式组3y-x≥0,y+2x+a≥0,y-2x-2≤0,若x²+y²的最小值为5, 设实数x，y满足条件x≥0x≤yx+2y≤3 若实数x，y满足不等式组2x−y≥0x+y−3≥03x+y−8≤0 设m>1,在约束条件{y≥x y≤mx x+y≤1 已知实数x，y满足2x+y−2≥0x−2y+4≥03x−y−3≤0则x