1 |
3 |
1 |
f′(an) |
1 |
an |
1 |
3 |
2a |
3 |
a |
3 |
π |
2 |
2a |
3 |
a |
3 |
3 |
2 |
3 |
2 |
5 |
2 |
1 |
f′(an) |
1 |
3an+1 |
3an |
3an+1 |
an |
3an+1 |
1 |
an+1 |
1 |
an |
1 |
a1 |
| ||
2 |
n |
4 |
3n2+2n |
4 |
3 (n-1)2+2 (n-1) |
4 |
n (1+3n-2) |
2 |
-3n2-2n+1 |
4 |
|
A.-x(1-x) | B.x(1-x) | C.-x(1+x) | D.x(1+x) |
A.
| B.
| C.
| D.
|
1 |
3 |
3 |
1 |
2 |
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