1 |
1×2 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
3 |
4 |
1 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2006×2007 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
99 |
1 |
98 |
1 |
100 |
1 |
99 |
|
|
1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2007 |
1 |
2007 |
2006 |
2007 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
99 |
1 |
100 |
1 |
100 |
99 |
100 |
1 |
9 |
1 |
6 |
1 |
18 |
1 |
6 |
1 |
2 |
1 |
4 |
1 |
5 |
a+b |
m |