1 |
3 |
Sn |
10000+Sn |
1 |
3 |
128(1-1.5n) |
1-1.5 |
657 |
32 |
1 |
3 |
x |
2 |
1 |
2i |
1 |
2i-1 |
1 |
2 |
1 |
4 |
1 |
2i |
1 |
2i |
1 |
2i-1 |
lim |
n→∞ |
an |
an_-1 |
2 |
A.2n-1﹡ | B.2n+1-2 | C.2
| D.2
|
1 |
3n |
A.2n+n-1 | B.2n-1 | C.2n+1 | D.2n-n-1 |
A.S8a9>S9a8 | B.S8a9<S9a8 | C.S8a9=S9a8 | D.不确定 |
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