2 |
1×3 |
2 |
3×5 |
2 |
5×7 |
2 |
(2n-1)(2n+1) |
2 |
1×3 |
2 |
3×5 |
2 |
5×7 |
2 |
(2n-1)(2n+1) |
2 |
1×3 |
2 |
3 |
2 |
1×3 |
2 |
3×5 |
4 |
5 |
2 |
1×3 |
2 |
3×5 |
2 |
5×7 |
6 |
7 |
2 |
1×3 |
2 |
3×5 |
2 |
5×7 |
2 |
7×9 |
8 |
9 |
2 |
3 |
2×1 |
2×1+1 |
4 |
5 |
2×2 |
2×2+1 |
6 |
7 |
2×3 |
2×3+1 |
8 |
9 |
2×4 |
2×4+1 |
2n |
2n+1 |
n |
x1+x2+…xn |
1 |
2n+1 |
A.2n+1 | B.2n-1 | C.4n-1 | D.4n+1 |
bn |
an |
n |
an |
an+1+an-1 |
an+1-an+1 |
an |
n+c |
1 |
S1 |
1 |
S2 |
1 |
Sn |
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