Prove the following by using the principle of mathematical induction for all :
Q: 23 is a multiple of
Let the given statement be p(n) i.e.
For n = 1 we have
, which is divisible by 27, hence true
For n = k we have
, Let's assume that this is divisible by 27 = 27m
Now,
For n = k + 1 we have
where some natural number
Thus, p(k+1) is true whenever p(k) is true
Hence, by the principle of mathematical induction, statement p(n) is divisible by 27 for all natural numbers n