Question

1) Find the first three terms of the sequence below. Tn= n^2 + 2n+9

Answer 1

The first 3 terms are 12, 17 and 24.

Explanation:

You have to put in n = 1, 2, 3 as they want only first 3 terms :

`Tn = {n}^(2) + 2n + 9`

`T1 = {1}^(2) + 2(1) + 9 = 12`

`T2 = {2}^(2) + 2(2) + 9 = 17`

`T3 = {3}^(2) + 2(3) + 9 = 24`