f(n) = 3 f(n-1) + 2

I would probably keep "f(n) =" outside of the answer block, so the student would really only need to type 3 f(n-1) + 2.

I know that I would add n as a variable to the context. But what do I do about f? In particular, I don't want to define f as a computable function, just that it is a function.

Thanks,

- D. Brian Walton