1 |
f(n) |
1 |
2n |
1 |
2n-1 |
1 |
1×3 |
1 |
3×5 |
1 |
(2n-1)×(2n+1) |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
2n+1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2n |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n |
1 |
2n+1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
4 |
| ||||
1-
|
2 |
3 |
1 |
4 |
|
1 |
2 |
1 |
2 |
A.1600元 | B.1800元 | C.2000元 | D.2200元 |
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