Problem
If \( a_{1}=2 \) and \( a_{n}=\left(a_{n-1}\right)^{2}-2 \) then find the value of \( a_{4} \). Answer: Submit Answer
Solution
Step 1 ：a_2 = (a_1)^2 - 2 = (2)^2 - 2 = 2
Step 2 ：a_3 = (a_2)^2 - 2 = (2)^2 - 2 = 2
Step 3 ：a_4 = (a_3)^2 - 2 = (2)^2 - 2 = 2
