题干
设实数x，y满足 {y≤2x+2 x+y−2≥0 x≤2
的取值范围是____．
| x |
| + |
| y |
| 1 |
| x |
| + |
| 3 |
答案(点此获取答案解析）
| 1 |
| 5 |
| 7 |
| 5 |
