n+1 |
2cn |
cn+1 |
cn |
n+1 |
2cn |
n+1 |
2n+1 |
n+1 |
2cn |
2 |
22 |
3 |
23 |
4 |
24 |
n+1 |
2n+1 |
1 |
2 |
2 |
23 |
4 |
24 |
n |
2n+1 |
n+1 |
2n-2 |
1 |
2 |
2 |
22 |
1 |
23 |
1 |
24 |
1 |
25 |
n |
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 |
1 |
3 |
Sn |
Sn-1 |
1 |
bnbn+1 |
an |
S1+S2+…+Sn |
n |
A.991 | B.1001 | C.1090 | D.1100 |
A.(2n-1)2 | B.
| C.4n-1 | D.
|
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