2 |
1+x |
fn(0)-1 |
fn(0)+2 |
A.(
| B.(
| C.(
| D.(
|
2 |
1+0 |
f1(0)-1 |
f1(0)+2 |
2-1 |
2+2 |
1 |
4 |
fn+1(0)-1 |
fn+1(0)+2 |
f1[fn(0)]-1 |
f1[fn(0)]+2 |
| ||
|
1-fn(0) |
4+2fn(0) |
1 |
2 |
fn(0)-1 |
fn(0)+2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
4 |
1 |
2 |
1 |
2 |
a |
a-1 |
2Sn |
an |
1 |
1+an |
1 |
1-an+1 |
1 |
3 |
A.16 | B.32 | C.48 | D.64 |
A.27 | B.-18 | C.-27 | D.24 |
A.1 | B.-
| C.1或-
| D.1或
|
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