有個數學問題， 看誰能做出來？

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^- ♂ (0 bytes) () 09/20/2009 postreply 14:45:45

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

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

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

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

• No, it is simple if you care only about the prob. of extinction -innercool- ♀ (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- ♂ (100 bytes) () 10/19/2009 postreply 18:21:36

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