Evaluate
(n+6)! / (n+4)!
20點!!!!F.6 M&S問題
2010-08-20 3:36 am
回答 (4)
2010-08-20 3:39 am
✔ 最佳答案
So,(n+6)! / (n+4)!
= (n + 6)(n + 5)(n + 4)(n + 3) ..... / (n + 4)(n + 3) (n + 2)(n + 1) ....
= (n + 6)(n + 5)
= n^6 + 11n + 30
2010-08-19 21:19:53 補充：
無辜啊!!!
我明明係打n^2 + 11n + 30
近期什麼事呢??
總然知，
答案係n^2 + 11n + 30
打錯字
參考: My Maths Knowledge
2010-08-20 6:43 am
(n+6)!/(n+4)!
=(n+6)(n+5)(n+4)!/(n+4)!
=(n+6)(n+5)(1)
=(n+6)(n+5)
=n*n+n*5+6*n+6*5
=n^2+5n+6n+30
=n^2+11n+30
=(n+6)(n+5)(n+4)!/(n+4)!
=(n+6)(n+5)(1)
=(n+6)(n+5)
=n*n+n*5+6*n+6*5
=n^2+5n+6n+30
=n^2+11n+30
參考: Knowledge is power
2010-08-20 4:16 am
第一位真係可惜....
但錯就係錯
但錯就係錯
2010-08-20 3:53 am
(n+6)! / (n+4)!
= (n+6)(n+5)(n+4)! / (n+4)!
= (n+6)(n+5)
= n^2 + 5n + 6n + 30
= n^2 + 11n + 30
Hope that I can help you to solve your problem :>
= (n+6)(n+5)(n+4)! / (n+4)!
= (n+6)(n+5)
= n^2 + 5n + 6n + 30
= n^2 + 11n + 30
Hope that I can help you to solve your problem :>
參考: Myself
收錄日期: 2021-04-23 23:22:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100819000051KK01532