an+1 |
(an+1-3)•Sn+1 |
an+1 |
(an+1-3)•Sn+1 |
4n |
(4n-1)(4n+1-1) |
1 |
3 |
1 |
4n-1 |
1 |
4n+1-1 |
1 |
3 |
1 |
41-1 |
1 |
42-1 |
1 |
3 |
1 |
42-1 |
1 |
43-1 |
1 |
3 |
1 |
4n-1 |
1 |
4n+1-1 |
1 |
3 |
1 |
41-1 |
1 |
4n+1-1 |
1 |
9 |
1 |
3(4n+1-1) |
1 |
bnbn+1 |
1 |
4 |
|
1 |
4 |
lim |
n→∞ |
an |
a1 |
an |
1 |
2 |
an |
a |
a |
a |
a1 |
a2 |
an |
a1 |
b1 |
b2 |
. |
bn |
OB |
b1 |
b2 |
bn |
lim |
n→∞ |
lim |
n→∞ |
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