Question

A sequence starts 1,5,9,13,17 What’s the formula for the nth term of this sequence??

Answer 1

This is an arithmetic sequence, since it's pattern is +4.

n1 = 1

d = 4

n = 1 + (n-1)(4) <-------------- This is the formula for the nth term of the sequence.

Answer 2

The pattern is going up by 4 so you take away 4
1-4=-3

The nth term = 4n-3