n+1 |
4an |
n+1 |
4an |
n+1 |
4×2n-1 |
n+1 |
2n+1 |
2 |
22 |
3 |
23 |
4 |
24 |
n+1 |
2n+1 |
1 |
2 |
2 |
23 |
3 |
24 |
4 |
25 |
n |
2n+1 |
n+1 |
2n+2 |
1 |
2 |
2 |
22 |
1 |
23 |
1 |
24 |
1 |
25 |
1 |
2n+1 |
n+1 |
2n+2 |
1 |
2 |
| ||||
1-
|
n+1 |
2n+2 |
3 |
4 |
1 |
2n+1 |
n+1 |
2n+2 |
3 |
2 |
1 |
2n |
n+1 |
2n+1 |
3 |
2 |
n+3 |
2n+1 |
A.1 | B.-
| C.-
| D.-1或
|
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