F.4 A.MATHS

2008-09-07 9:22 pm
Prove each of the following by mathematical induction,where n is a
natural number.

1. 1*4+2*7+3*10+...+n(3n+1)=n(n+1)^2
2. 1^3+3^3+5^3+...+(2n-1)^3=n^2(2n^2-1)

回答 (1)

2008-09-07 9:47 pm
✔ 最佳答案
As follows:

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