作者brucejune (...)
看板Statistics
标题[问题] 一题机率
时间Fri Aug 8 18:48:30 2008
问题：
Choose two points on the unit circle randomly.
Find the probability density of the length of the chord conecting
the two points.
答案：
(4/(π^2 *(4-r^2)^(-1/2)))*(π-2sin的反函数(r/2)) , 0 < r < 2
题目是大概看得懂，不过不知道要从何下手
这题卡了有点久，烦请版上的朋友帮我解答^^
谢谢!!
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1F：推 clickhere:Good question! Try this to get some idea. 08/09 02:53
3F：→ clickhere:3.3.2.html 08/09 02:54
4F：→ clickhere:Make a transformation on (3.51) 08/09 02:55
5F：→ brucejune:thanks 08/09 18:47