| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 35 |
| 1 |
| 63 |
| 1 |
| 9999 |
=（1-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 99 |
| 1 |
| 101 |
| 1 |
| 2 |
=（1-
| 1 |
| 101 |
| 1 |
| 2 |
=
| 100 |
| 101 |
| 1 |
| 2 |
=
| 50 |
| 101 |
1/3+1/15+1/35+1/63+…+1/9999．
| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 35 |
| 1 |
| 63 |
| 1 |
| 9999 |
数学人气：698 ℃时间：2020-03-31 11:29:02
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