1 |
22 |
1 |
32 |
1 |
42 |
1 |
20062 |
1 |
22 |
1 |
32 |
1 |
42 |
1 |
20042 |
1 |
20052 |
1 |
20062 |
22-1 |
22 |
32-1 |
32 |
42-1 |
42 |
20052-1 |
20052 |
20062-1 |
20062 |
1 |
2 |
2007 |
2006 |
2007 |
4012 |
2007 |
4012 |
A.x2+
| B.x2+2xy-y2 | C.x2+xy+y2 | D.4x2+4x+1 |
3 |
a2+1 |
A.2010 | B.2009 | C.2008 | D.2007 |
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