Question

If a1=2 and an+1 =(an)² - 4 then find the value of a4

Answer 1

From the Question given, we are able to write the following relationship:

$\begin{gathered} a_1=2 \\ a_{n+1}=(a_n)²-4 \end{gathered}$

By substituting the values 1, 2, and 3, we are able to calculate as follows: