Q5: http://img.chinsin.com/a/1392023390x-876949245.jpg
Q6: http://img.chinsin.com/a/1392023451x-876949245.jpg
Q8-9: http://img.chinsin.com/a/1392023483x-876949245.jpg
Q7: http://img.chinsin.com/a/1392023524x-876949245.jpg
Q11: http://upload.lsforum.net/users/public/g21198DSC_4203e3.jpg
Q10: http://img.chinsin.com/a/1392023830x-876949245.jpg
Q11(2): http://img.chinsin.com/a/1392023850x-876949245.jpg
Q10(2): http://img.chinsin.com/a/1392023868x-876949245.jpg
急要以上題目ANS(連STEPS),THX!!
F.5 MATHS PERMUTATION!!(10點)
2014-02-11 1:19 am
回答 (1)
2014-02-13 7:11 pm
✔ 最佳答案
0! = 1P(n,r) = n!/(n-r)! = n(n-1)(n-2)...(n-r+1)
C(n,r) = P(n,r)/r! = [n(n-1)(n-2)...(n-r+1)] / [r(r-1)(r-2)...1]
Using the above 3 facts, you will find out the answers that you ask.
收錄日期: 2021-04-20 14:51:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140210000051KK00124