Question

◾Suppose you have the following recursion formula a1 = 1, a2 = 2, and an = an - 1)+ an - 2)for integers n ≥ 3. How would you determine the next three terms?

Answer 1

\[\large a_1=1\\
\large a_2=2\\
\large a_n=a_{n-1}+a_{n-2}, n\ge 3 ~? \]