S2011 |
2011 |
S2009 |
2009 |
A.-2011 | B.2011 | C.-2012 | D.2012 |
S2011 |
2011 |
S2009 |
2009 |
a1+a2011 |
2 |
a1+a2009 |
2 |
2012(2012-1) |
2 |
1 |
an |
A.4 | B.3 | C.2 | D.1 |
1 |
x+1 |
5 |
6x |
1 |
x |
A.50
| B.13
| C.24 | D.8
|
ON |
OM |
OP |
A.15 | B.10 | C.40 | D.20 |
Sn |
Tn |
3n-1 |
2n+3 |
a9 |
b9 |
1 |
Sn |
Sn |
2n+1 |
1 |
4 |
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