2 |
1+an |
1-an |
1+f(x) |
1-f(x) |
1+f(x+1) |
1-f(x+1) |
1+
| ||
1-
|
1 |
f(x) |
1+f(x+2) |
1-f(x+2) |
1-
| ||
1+
|
f(x)-1 |
f(x)+1 |
1+f(x+3) |
1-f(x+3) |
1+
| ||
1-
|
1+an |
1-an |
1+
| ||
1-
|
2 |
1-3-2
| ||
1+3+2
|
| ||
2 |
1-
| ||||
1+
|
2 |
2 |
2 |
| ||
2 |
2 |
2 |
2 |
2n+1an | ||
(n+
|
2n |
an |
2n |
cn•cn+1 |
bn |
an |
n |
2 |
n |
an |
1 |
2 |
1 |
a1+1 |
1 |
a2+1 |
1 |
a2011+1 |
A.0 | B.1 | C.2 | D.3 |
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