2x |
x+1 |
2 |
3 |
1 |
an |
1 |
3 |
2x |
x+1 |
2x-x2-x |
x+1 |
-x(x-1) |
x+1 |
2 |
3 |
1 |
an |
2an |
an+1 |
1 |
an+1 |
1 |
2 |
1 |
2an |
2 |
3 |
1 |
an |
bn+1 |
bn |
| ||
|
| ||||
|
| ||||
|
1 |
2 |
1 |
a1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2n |
2 |
3 |
1 |
an |
1 |
bn+1 |
1 | ||
|
2n |
2n+1 |
2n |
2n+1 |
2n+1 |
2n+1+1 |
1 |
2n+1 |
2n |
2n+1 |
1 |
2n+1+1 |
1 |
2n+1 |
1 |
2n+1+1 |
1 |
21+1 |
1 |
22+1 |
1 |
22+1 |
1 |
23+1 |
1 |
2n+1 |
1 |
2n+1+1 |
1 |
3 |
1 |
2n+1+1 |
1 |
3 |
1 |
3 |
1 |
4 |
3 |
4 |
b |
2 |
1 |
4 |
b-5 |
a-2 |
| ||
k个5 |
| ||
2k个5 |
14 |
5 |
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