Question: 9. For all n EN, prove that r - 1 is a factor of n - 1. Then use this to show that 22n3n

9. For all n EN, prove that r - 1 is a

9. For all n EN, prove that r - 1 is a factor of n - 1. Then use this to show that 22n3n - 1 has 11 as a prime factor.

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