題目列表(包括答案和解析)
| x |
| x-1 |
| x+3 |
| x2-1 |
| x2+2x+1 |
| x+3 |
| 2 |
|
|
| x+2 |
| x2-2x |
| x-1 |
| x2-4x+4 |
| x-4 |
| x |
| 3 |
| 1 |
| x+1 |
| 1 |
| x2-1 |
| x+1 |
| x2-2x+1 |
| 3 |
| 2x-3 |
| x |
| x2-9 |
| x |
| 1 | 2 |
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