题目列表(包括答案和解析)
| x2 | ||
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| y2 | ||
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| x2 | ||
|
| y2 | ||
|
| a2 |
| a1 |
| b2 |
| b1 |
|
| 6 |
| x2 |
| 4 |
| y2 |
| 2 |
| 1 |
| |OB| |
| x2 |
| 22 |
| y2 | ||
(
|
| x2 |
| 42 |
| y2 | ||
(2
|
| x2 |
| 32 |
| y2 | ||||
(
|
|
|
|
| 2 |
| 2 |
| 5 |
| 5 |
| 1 |
| 4 |
|
| 2 |
| 2×3 |
| 4 |
| 3×5 |
| 8 |
| 5×9 |
| 2n |
| (2n-1+1)(2n+1) |
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