- Aug 26, 2013djbroadhurst wrote :

> Definition: Let F(n) = ((5^n-9)/4)^2-5 for integer n > 0

1. For even n>0 F(n)-2 are divisible by 3

>

> Exercise 1: .........

2. For even k>0 F(2k-1)-2 are divisible by 2

3. For even k>0 F[3k-1)-2 are divisible by 3^2

4. For even k>0 F(6k-2)-2 are divisible by 7

5. For even k>0 F(14k-5)-2 are divisible by 29

How can you prove this relationship?.

marian otremba - << Previous post in topic Next post in topic >>