Question

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

Answer 1

Answer:

The first 3 terms are 12, 17 and 24.

Step-by-step explanation:

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

$Tn = {n}^{2} + 2n + 9$

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

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

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