7 |
6 |
1 |
2 |
1 |
3 |
bn+1 |
bn |
n |
n+1 |
2 |
3 |
an-
| ||
bn |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
2 |
3 |
1 |
2 |
2 |
3 |
2 |
3 |
1 |
2 |
2 |
3 |
2 |
3 |
2 |
3 |
1 |
2 |
2 |
3 |
1 |
2 |
bn+1 |
bn |
n |
n+1 |
b2 |
b1 |
1 |
2 |
b3 |
b2 |
2 |
3 |
b4 |
b3 |
3 |
4 |
bn |
bn-1 |
n-1 |
n |
bn |
b1 |
1 |
2 |
2 |
3 |
3 |
4 |
n-1 |
n |
1 |
n |
1 |
n |
1 |
n |
1 |
n |
an-
| ||
bn |
(
| ||
|
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
| ||||
1-
|
1 |
2 |
1 |
2 |
1 |
2 n |
1 |
2 |
2+n |
2n |
2+n |
2n |
|
1 |
3 |
A.
| B.-
| C.-5 | D.5 |
5 |
5 |
A.4 | B.±4 | C.6 | D.-6 |
a | 1 |
1 |
2 |
an |
n |
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