题目列表(包括答案和解析)
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 9×10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
| 9 |
| 10 |
| 1 |
| 1×3 |
| 1 |
| 3×5 |
| 1 |
| 5×7 |
| 1 |
| 19×21 |
| 1 |
| 1×4 |
| 1 |
| 4×7 |
| 1 |
| 7×10 |
| 1 |
| (3n-2)(3n+1) |
| x-3 |
| x2-1 |
| 3 |
| 1-x |
| x-3 |
| (x+1)(x-1) |
| 3 |
| x-1 |
| x-3 |
| (x+1)(x-1) |
| 3(x+1) |
| (x+1)(x-1) |
| 1-x |
| x-2 |
| 1 |
| 2-x |
| x-3 |
| x2-1 |
| 3 |
| 1-x |
| x-3 |
| (x+1)(x-1) |
| 3 |
| x-1 |
| x-3 |
| (x+1)(x-1) |
| 3(x+1) |
| (x+1)(x-1) |
| 5 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
| 5 |
| 6 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| a |
a2-2+
|
| 1 |
| 2 |
| 1 |
| a |
(a-
|
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 2 |
| a |
| 1 |
| 2 |
| 1 |
| 2 |
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