Sunday, 10 September 2017

proof writing - Prove by induction $9 mid (4^{3n}-1)$?

Prove by induction that $9 \mid (4^{3n}-1)$ for all natural numbers n.




How do start proof by induction? if n is a natural number, how will Lhs = Rhs



LHS= left hand side RHS = right hand side

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