1 |
3 |
Sn |
Sn-1 |
1 |
bnbn+1 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
2 |
9 |
2 |
27 |
a22 |
a3 |
| ||
-
|
2 |
3 |
1 |
3 |
a2 |
a1 |
1 |
3 |
2 |
3 |
1 |
3 |
1 |
3 |
Sn |
Sn-1 |
Sn |
Sn-1 |
Sn |
Sn-1 |
Sn |
Sn |
Sn-1 |
Sn |
Sn |
1 |
bnbn+1 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
2n-1 |
1 |
2n+1 |
1 |
b1b2 |
1 |
b2b3 |
1 |
bnbn+1 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
7 |
1 |
9 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
2n+1 |
n |
2n+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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