Question

Complete the recursive formula of the arithmetic sequence 13,17,21,25
a(1) =
a(n) = a(n - 1) +

Answer 1

Answer:

$a_{n} = 4n+9$

Step-by-step explanation:

$a_{n} = a_{1} +(n - 1)d$

$a_{n} = 13 +(n - 1)4$

$a_{n} = 13 +4n-4$

$a_{n} = 4n+13-4$

$a_{n} = 4n+9$