1+
|
3 |
2 |
1+
|
7 |
6 |
1+
|
13 |
12 |
1+
|
1+
|
n2+n+1 |
n(n+1) |
1+
|
1+
|
1+
|
1+
|
1+
|
n2+n+1 |
n(n+1) |
1+
|
|
| ||
n(n+1) |
n2+n+1 |
n(n+1) |
n2+n+1 |
n(n+1) |
1 |
n |
1 |
n+1 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
2005 |
1 |
2006 |
1 |
2006 |
2005 |
2006 |
1 | ||
|
2 |
A.a=b | B.a>b | C.a<b | D.ab=1 |
1 | ||
|
1 | ||||
|
1 | ||||
|
a
| ||||
|
1 | ||
|
1 | ||
|
2 | ||
|
1 |
2 |
a |
a+1 |
a2 |
a2-1 |
2 |
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