Question

Given the third term is 12 and the rate of change is 3. What is the first 5 terms ?

Answer 1

6, 9, 12, 15, 18

Explanation:

If the third term is 12, then to find the first term subtract 3 twice (or just subtract 6) to get 6. To find the rest of the terms add 3 accordingly. The equation to find this would be:

a_n = 6 + (n-1)3