Site icon Noon Academy

Prove 3^2n – 1 is divisible by 8, for all natural numbers n.

As indicated by the inquiry,

   

is distinct by 8.

Along these lines, subbing various qualities for n, we get,

   

which is separable by 8.

   

which is distinguishable by 8.

   

which is detachable by 8.

   

which is distinguishable by 8.

Let

   

be detachable by 8

In this way, we get,

   

Presently, we likewise get that,

   

   

   

is distinct by 8.

   

is valid when P(k) is valid.

Subsequently, by Mathematical Induction,

   

is detachable by 8, for all regular numbers n.