1 |
bn |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1-(-
| ||
1+
|
2 |
3 |
1 |
2 |
|
1 |
2 |
1 |
bn |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
n+1 |
1 |
(n+1)(n+2) |
1 |
n+1 |
1 |
n+2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
n+1 |
1 |
n+2 |
1 |
2 |
1 |
n+2 |
n |
2(n+2) |
n |
2(n+2) |
1 |
2 |
1 |
n+2 |
1 |
2 |
1 |
n+2 |
1 |
6 |
1 |
6 |
1 |
6 |
x |
2(x+2) |
1 |
(x+2)2 |
1 |
6 |
n |
2(n+2) |
1 |
6 |
1 |
6 |
1 |
6 |
1 |
2 |
1 |
2n |
1 |
7 |
3 |
2 |
lim |
n→∞ |
1 |
sn |
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