Question

View attachment:

Answer 1

Ok, I got it.

Answer 2

Do you understand what each recursive formula means?

Answer 3

Uhm, nope.

Answer 4

I'll explain them to you then you'll be able to see which choice is correct.

Answer 5

The first choice is
f(1) = 1; f(2) = 2; f(n) = 2f(n - 1) f(n - 2); n>2

This means the following:
The first term, for n = 1 is 1.
The second term, for n = 2 is 2.

To find terms higher than n = 2, take two times the previous term times the term before that.