Question

find $a_5$.
$a_1 = 1$
$a_2 = 4$
$a_n = a_{n - 2}$
write your answer as an integer or fraction in simplest form.
$a_5 = $

Explanation:

Step1: Identify recurrence relation

$a_n = a_{n-2}$

Step2: Calculate $a_3$ using $a_1$

$a_3 = a_{3-2} = a_1 = 1$

Step3: Calculate $a_5$ using $a_3$

$a_5 = a_{5-2} = a_3 = 1$

Answer:

1