3 |
2 |
1 |
1+3l |
1 |
1+3k |
3 |
2 |
3 |
2 |
an+1 |
an |
1 |
bn |
1 |
bn+1 |
1 |
bn |
an+1 |
an |
1 |
bn |
1 |
b1 |
| ||||
k-l |
1+3l-1-3k |
k-l |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
bk |
1 |
b1 |
1 |
b1 |
1 |
bn |
1 |
28-3n |
1 |
b1 |
1 |
bn |
1 |
3 |
1 |
3 |
1 |
bn |
1 |
bn |
|
|
2 |
3 |
1 |
3 |
an-1 |
can-1+1 |
1 |
an |
2 |
3 |
4
| ||
4
|
A.10 | B.15 | C.20 | D.40 |
1 |
4 |
an+1 |
an |
1 |
4 |
1 |
4 |
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