prove-that-7-k-1-13-7k-1-k-N-

Question Number 187007 by Humble last updated on 12/Feb/23

p r o v e t h a t

7^{k + 1} ∣ 13^{7 k} + 1, \forall k \in N

Commented by Frix last updated on 13/Feb/23

{It}^{'} s wrong for k = 2

Commented by Humble last updated on 14/Feb/23

m a y i s e e y o u r a p p r o a c h ?

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