1 |
a1a2 |
1 |
a2a3 |
1 |
anan+1 |
1 |
anan+1 |
1 |
d |
1 |
an |
1 |
an+1 |
1 |
d |
1 |
a1 |
1 |
a2 |
1 |
a2 |
1 |
a3 |
1 |
an |
1 |
an+1 |
1 |
d |
1 |
a1 |
1 |
an+1 |
1 |
d |
an+1-a1 |
a1an+1 |
n |
a1(a1+nd) |
3 |
2 |
1 |
2 |
1 |
4 |
1 |
S1-1 |
1 |
S2-1 |
1 |
S3-1 |
1 |
S15-1 |
PnPn+1 |
A.n(n-
| B.n(n-
| C.n(n-
| D.n(n-
|
f(an) |
f′(an) |
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