Question

Arithmetic sequence. Write a function rule to represent each sequence given below 1. 7 11 15 19

Answer 1

`a_(n)` = a + d(n - 1) ; where a is the first term (a = 7), d is the difference (d = 4), and n is the term

`a_(n)` = 7 + 4(n - 1)

= 7 + 4n - 4

= 4n + 3