1 |
2 |
1 |
3 |
2 |
3 |
1 |
4 |
2 |
4 |
3 |
4 |
1 |
n |
2 |
n |
n-1 |
n |
n |
(an+1-an)n |
1 |
n |
2 |
n |
n-1 |
n |
(
| ||||
2 |
n+1 |
2 |
(n+1)+1 |
2 |
n+1 |
2 |
1 |
2 |
1 |
2 |
n |
(an+1-an)n |
n | ||
(
|
2(1-2n) |
1-2 |
S12 |
12 |
S10 |
10 |
OA |
OB |
OC |
OC |
OA |
OB |
S2007 |
2007 |
S2005 |
2005 |
A.0 | B.2009 | C.-2009 | D.-2009×2009 |
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