Question

Find the second, fifth, and ninth terms of the sequence. an = -7 + (n - 1) 4

Answer 1

Answer:

- 3, 9, 25

Step-by-step explanation:

To find the required terms of the sequence substitute n = 2, 5, 9 into the given rule, that is

$a_{2}$ = - 7 + (2 - 1)4  = - 7 + (1 × 4) = - 7 + 4 = - 3

$a_{5}$ = - 7 + (5 - 1)4 = - 7 + (4 × 4) = - 7 + 16 = 9

$a_{9}$ = - 7 + (9 - 1)4 = - 7 + (8 × 4) = - 7 + 32 = 25