2 |
3 |
2an |
an+1 |
1 |
an |
2an |
an+1 |
1 |
an+1 |
an+1 |
2an |
1-an |
2an |
1 |
2 |
1 |
an |
2 |
3 |
1 |
a1 |
1 |
2 |
1 |
an |
1 |
a1 |
1 |
2 |
1 |
2 |
1 |
an |
1 |
2 |
1 |
2 |
1 |
2n |
2n |
2n+1 |
2n+1 |
2n+1+1 |
an+1 |
an |
2n+1 |
2n+1+1 |
2n+1 |
2n |
2n+1+2 |
2n+1+1 |
1 |
2n+1+1 |
1 |
2n+1+1 |
6 |
5 |
6 |
5 |
|
1 |
2 |
1 |
1+xn |
1 |
6 |
2 |
5 |
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