AL 2001 PAPER I Q2
(a) n
Show thatΣ r^2=1/6n(n+1)(2n+1)
r=1
(b) A sequence an is defined as folows:
a1 = 6,
a k+1=ak+3k^2+9k+6 for k=1,2,3,...
Find an in terms of n.
pure maths
2009-09-30 2:30 am
回答 (1)
2009-09-30 5:04 pm
✔ 最佳答案
As follows:圖片參考：http://i726.photobucket.com/albums/ww265/physicsworld2010/physicsworld01Sep300903.jpg?t=1254272633
參考: Physics king
收錄日期: 2021-04-19 15:27:27
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