First thing I guess is to label the equation;Use Proof by Mathematical induction to prove that 7^n + 2 is divisible by 3 for all n in the Natural Numbers.

And then Show that it holds for n=1:

So it works for 1; 9 is divisible by 3.

Now for p(n+1)...

Now how do I go about showing that that's divisible by 3?