若实数x，y满足条件0≤x≤10≤y≤22y−x≥1

若实数x，y满足条件0≤x≤10≤y≤22y−x≥1 设实数x，y满足条件x≥0x≤yx+2y≤3 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 若实数x，y满足x≥1x+y≤4x−2y+c≤0 若实数x，y满足x−y+1≥0x+y≥0x≤0 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. 已知实数x，y满足条件2x+y≥3x+y−3≤0x≥0y≥0 若实数x、y，满足x≥0y≥04x+3y≤12 若实数x，y满足y≥1y≤2x−1x+y≤m. 若实数x，y满足不等式组x-y+1≥0x+y-1≤0y≥0 若实数x,y满足条件（x+y－2≥0 x－y+1≥0 x≤1）则 （x+2y）/（x+y）的最小值为 若实数x,y满足约束条件x-y≥0,x+y≥0,2x+y≤1,则y/(x+1)的最大值是多少,