2n |
3 |
4 |
9 |
1 |
2 |
1 |
2 |
1 |
2 |
2n |
3 |
4 |
9 |
2(n+1) |
3 |
4 |
9 |
1 |
2 |
2(n+1) |
3 |
4 |
9 |
1 |
2 |
n |
3 |
2 |
9 |
1 |
2 |
2n |
3 |
4 |
9 |
1 |
2 |
2 |
3 |
4 |
9 |
2 |
9 |
2 |
9 |
2 |
9 |
1 |
2 |
2 |
9 |
A.182 | B.242 | C.273 | D.484 |
lim |
n→∞ |
nan |
S2n |
A.
| B.
| C.1 | D.2 |
A.44 | B.-44 | C.66 | D.-66 |
A.-1 | B.-2 | C.2 | D.1 |
Sn |
n+c |
1 |
2 |
8 |
(an+7)•bn |
2bn |
an-2 |
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