若实数x、y满足x−y+1≤0x＞0x≤2

若实数x、y满足x−y+1≤0x＞0x≤2 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 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, 若实数x，y满足条件0≤x≤10≤y≤22y−x≥1 线性规划数学题：实数x,y满足x-y+1≤0,x>0,y≤2,若 若实数x,y满足x-4y+3≤0,3x+5y-25≤0,x≥1,则2x-y的最大值是多少 若实数x,y满足{2x-y>=0, 若实数x、y，满足x≥0y≥04x+3y≤12 若实数x，y满足x−y+1≤0x＞0y≤2，则yx的取值范围是（　　） 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