Question

Write an equation for the n th term of the arithmetic sequence then find a10 -6,-9,-12,-15

Answer 1

Answer: $a_{10}$ = -33

Step-by-step explanation:

-6, -9, -12, -15

The common difference is -3

d = common difference

Arithmetic sequence formula:

$a_{n}$ = $a_{1}$ + (n - 1) d

$a_{10}$ = -6 + (10 - 1) -3

$a_{10}$ = -6 + 9 × -3

$a_{10}$ = -6 - 27

$a_{10}$ = -33