1 |
an+1 |
1 |
an+2 |
1 |
an+3 |
1 |
a2n |
1 |
6 |
(n-1)(n+2) |
2 |
1 |
an+1 |
1 |
an+2 |
1 |
an+3 |
1 |
a2n |
1 |
(n+1)(n+2) |
1 |
(n+2)(n+3) |
1 |
(n+3)(n+4) |
1 |
2n(2n+1) |
1 |
n+1 |
1 |
n+2 |
1 |
n+2 |
1 |
n+3 |
1 |
n+3 |
1 |
n+4 |
1 |
2n |
1 |
2n+1 |
1 |
n+1 |
1 |
2n+1 |
n |
2n2+3n+1 |
1 | ||
2n+
|
1 |
x |
| ||
2 |
1 |
n |
1 |
6 |
1 |
6 |
1 |
6 |
1 |
6 |
|
|
a | 2n |
1 | ||
|
1 | ||
|
1 | ||
|
1 | ||
|
11 |
10 |
1 |
S1 |
1 |
S2 |
1 |
Sn |
n |
3 |
3 |
2 |
1 |
a1 |
1 |
a2 |
1 |
a3 |
1 |
a2009 |
A.3 | B.2 | C.1 | D.0 |
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