Mathematical Induction 15pt.

2010-09-16 6:22 am
Prove, by mathematical induction, that for all positive integers n, the following propositions is true.

n*1+(n-1)*2+(n-2)*3+...+3*(n-2)+2*(n-1)+1*n=n(n+1)(n+2)/6

PLEASE HELP WITH STEPS. THANK YOU SO MUCH

回答 (1)

2010-09-16 6:55 am
✔ 最佳答案
As follows:


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