1 |
2 |
1 |
1×2 |
1 |
2 |
1 |
3 |
1 |
2×3 |
1 |
3 |
1 |
4 |
1 |
3×4 |
1 |
4 |
1 |
5 |
1 |
4×5 |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
n(n+1) |
2 |
3 |
1 |
n |
1 |
n+1 |
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
n+1 |
n(n+1) |
n |
n(n+1) |
n+1-n |
n(n+1) |
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
n(n+1) |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
n |
1 |
n+1 |
1 |
n+1 |
2 |
3 |
1 |
2 |
1 |
6 |
1 |
2 |
1 |
7 |
1 |
42 |
1 |
2 |
1 |
7 |
1 |
43 |
1 |
1806 |
A.0 | B.1 | C.2 | D.3 |
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