1 |
13 |
1 |
23 |
1 |
33 |
1 |
993 |
1 |
k3 |
1 |
k(k2-1) |
1 |
2 |
1 |
(k-1)k |
1 |
k(k+1) |
1 |
23 |
1 |
33 |
1 |
993 |
1 |
2 |
1 |
2 |
1 |
99×100 |
5 |
4 |
A.737 | B.700 | C.723 | D.730 |
A.-1 | B.1 | C.-2011 | D.4024 |
1 |
2009 |
1 |
2008 |
1 |
2007 |
1 |
2 |
1-x2 |
1+x2 |
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 |
n(n+1) |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
(2n-1)(2n+1) |
17 |
35 |
2 |
5 |
1 |
2 |
3 |
10 |
1 |
3 |
4 |
17 |
1 |
4 |
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