1. consider the equence {a(n)}. it is known that
a(1)=3, a(2)=5, and a(k)=3a(k-1)-2a(k-2)
prove by mathematical induction that a(n)= 2^n+1
2.if {a(n)}is asequence defined by a(1)=1, and a(n+1)=a(n)+n
prove that a(n)=(1/2)(n)(n-1)+1for all positive integers n
a-math question
2009-07-08 9:33 pm
回答 (1)
2009-07-08 9:58 pm
✔ 最佳答案
Question 1 sol.:http://i707.photobucket.com/albums/ww74/stevieg90/26-1.gif
Question 2 sol.:
http://i707.photobucket.com/albums/ww74/stevieg90/25-2.gif
收錄日期: 2021-04-22 00:45:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090708000051KK00899