Question

What is this answer to this question?

Answer 1

`a_(n)` = 7n + 11

Explanation:

the nth term of an arithmetic sequence is

`a_(n)` = a₁ + d(n - 1)

where a₁ is the first term and d the common difference

here a₁ = 18 and d = a₂ - a₁ = 25 - 18 = 7 , then

`a_(n)` = 18 + 7(n - 1) = 18 + 7n - 7 = 7n + 11