1 |
2 |
Sn |
2n+1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
Sn |
1 |
Sn-1 |
1 |
Sn |
1 |
Sn |
1 |
S1 |
1 |
2n-1 |
1 |
2n-1 |
1 |
2n-3 |
-2 |
(2n-1)(2n-3) |
|
Sn |
2n+1 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
2n+1 |
n |
2n+1 |
A.3 | B.6 | C.9 | D.36 |
A.
| B.d<3 | C.
| D.d>
|
1 |
an |
1 |
an |
1 |
an+1 |
A.38 | B.20 | C.10 | D.9 |
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