Question

What is the recursive formula for the sequence 20, 28, 36, 44?

Answer 1

ANSWER

$a_ {n} =a_ {n - 1} + 8, \: \: a_1=20$

EXPLANATION

The given sequence is:

$20,28,36,44,...$

The first term is

$a_1=20$

The constant difference is

$d = 28 - 20$

$d = 8$

The nth term of the sequence is given by the recursive formula,

$a_ {n} =a_ {n - 1} + 8, \: \: a_1=20$