Question

What is the 15th term in the arithmetic sequence described by this explicit formula? an = 63 + (n – 1)(–7)

Answer 1

a15 = 63 + (15 - 1)(-7)
a15 = 63 + 14(-7)
a15 = 63 - 98
a15 = - 35 <=== ur 15th term

Answer 2

Answer:

$a_{15}$ = -35.

Step-by-step explanation:

Given :  $a_{n}$ = 63 + (n – 1)(–7)

To find : What is the 15th term in the arithmetic sequence .

Solution : We have given  $a_{n}$ = 63 + (n – 1)(–7).

We need to find 15 th terms  ,  n = 15

$a_{15}$ = 63 + (15 – 1)(–7).

$a_{15}$ = 63 + 14 (-7).

$a_{15}$ = 63 -98.

$a_{15}$ = -35.

Therefore,  $a_{15}$ = -35.