x |
2009 |
2008 |
32 |
a2 |
33 |
a3 |
32009 |
a2009 |
A.18 | B.17 | C.-18 | D.19 |
x |
x |
x |
C | rn |
r |
2 |
r |
2 |
C | 2n |
3n |
an |
9 | ||
|
18 |
n(n-1) |
1 |
n-1 |
1 |
n |
2009 |
2008 |
32 |
a2 |
33 |
a3 |
32009 |
a2009 |
2009 |
2008 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
2008 |
1 |
2009 |
2009 |
2008 |
1 |
2 |
1 |
2009 |
4 | x |
2 | -x |
) | 6 |
A.1 | B.6 | C.15 | D.20 |
1 |
x |
A.-270 | B.-90 | C.90 | D.270 |
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