有個數學問題， 看誰能做出來？

來源: KingOfTheWorld 於 2009-09-20 08:17:21 [] [舊帖] [給我悄悄話] 閱讀數 : (164 bytes)

A colony starts with ONE bacteria. Each minute, either a bacteria dies with probability p, or splits one more into TWO.

What is expected life of the colony?

所有跟帖： 

• Search this forum, you will find the answer. -^V^- ♂ 給 ^V^ 發送悄悄話 ^V^ 的博客首頁 (0 bytes) () 09/20/2009 postreply 14:45:45

• 回複：Search this forum, you will find the answer. -Kingoftheworld- ♂ 給 Kingoftheworld 發送悄悄話 (23 bytes) () 09/20/2009 postreply 16:25:05

• Discussion welcome, no answer included -Mushy- ♂ 給 Mushy 發送悄悄話 (920 bytes) () 09/20/2009 postreply 20:29:56

• Not this simple. Someone says it needs Martingale -kingoftheworld- ♂ 給 kingoftheworld 發送悄悄話 (35 bytes) () 09/20/2009 postreply 20:48:11

• agreed, after wiki i found this: -Mushy- ♂ 給 Mushy 發送悄悄話 (672 bytes) () 09/21/2009 postreply 02:31:28

• No, it is simple if you care only about the prob. of extinction -innercool- ♀ 給 innercool 發送悄悄話 innercool 的博客首頁 (80 bytes) () 09/27/2009 postreply 12:35:55

• 回複：No, it is simple if you care only about the prob. of extincti -wyk- ♂ 給 wyk 發送悄悄話 wyk 的博客首頁 (100 bytes) () 10/19/2009 postreply 18:21:36

• 回複：有個數學問題， 看誰能做出來？ -bookreader- ♂ 給 bookreader 發送悄悄話 (589 bytes) () 09/24/2009 postreply 20:43:29

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