1 |
f(n) |
1 |
2n |
4 |
3 |
1 |
2n-1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2n |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n+1 |
1 |
2n |
1 |
2 |
1 |
1×3 |
1 |
3×5 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
1 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
2n+1 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
| ||||
1-
|
2 |
3 |
1 |
4 |
4 |
3 |
2 |
3 |
1 |
2n+1 |
2 |
3 |
1 |
4 |
2 |
3 |
1 |
4 |
1 |
2n+1 |
4 |
3 |
3 |
2 |
1 |
4n |
1 |
2n+1 |
4 |
3 |
A.f(x1)+f(x2)+f(x3)>0 | B.f(x1)+f(x2)+f(x3)<0 |
C.f(x1)+f(x2)+f(x3)=0 | D.f(x1)+f(x2)>f(x3) |
1 |
2 |
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