- UID
- 223330
- 帖子
- 360
- 主题
- 131
- 注册时间
- 2011-7-11
- 最后登录
- 2013-8-18
|
say rate = 10%
50/1.1 = 45.45
50/1.1^2 =41.32
total covered = 86.77
50/1.1^3 = 37.56 --> total covered = 124.33 > 100
so DPB = 2 + (100-86.77)/ (124.33-86.77) = 2.352
(Linear interpolation for approximation).
CP |
|
发表于 2011-7-11 19:49
|