2-2an+1 |
an+1-3 |
an-2 |
an+1 |
3 |
an+1 |
7 |
12 |
2-2an+1 |
an+1-3 |
an-2 |
an+1 |
4(an+1-2) |
an+1+1 |
bn+1 |
bn |
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4 |
1 |
4n |
an-2 |
an+1 |
2•4n+1 |
4n-1 |
4n+9 |
2n |
9 |
2n |
9 |
m |
9 |
2n |
9 |
2 |
9 |
4 |
25 |
4 |
25 |
4 |
25 |
4 |
3 |
an+1 |
1 |
4n |
1 |
4 |
1 |
42 |
1 |
4n |
1 |
4 |
1 |
42 |
1 |
4n |
3 |
4 |
45 |
64 |
11 |
16 |
1 |
4 |
1 |
42 |
1 |
4k |
1 |
4 |
1 |
42 |
1 |
4k |
1 |
4 |
1 |
42 |
1 |
4k |
1 |
4k+1 |
1 |
4 |
1 |
42 |
1 |
4k |
1 |
4k+1 |
1 |
4 |
1 |
42 |
1 |
4k+1 |
1 |
4 |
1 |
42 |
1 |
4n |
1 |
4 |
1 |
42 |
1 |
4n |
1 |
4 |
1 |
42 |
1 |
4n |
| ||
1-
|
1 |
3 |
1 |
4 |
1 |
42 |
1 |
4n |
1 |
4 |
1 |
42 |
1 |
4n |
1 |
3 |
7 |
12 |
7 |
12 |
c1 |
b1 |
c2 |
2b2 |
cn |
nbn |
A.12分钟 | B.11分钟 | C.10分钟 | D.9分钟 |
Sn-m |
Sn+1-m |
2m |
2m+1 |
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