Question

What is the 8th term of the arithmetic sequence with a first term of 7 and a common difference of -3?

Answer 1

Answer:

-17 is the answer.

Step-by-step explanation:

Your starting point is 7.

Next you know that it goes down by 3.

Finally you are looking for the 8th term.

So in all it would look like this. -3(8) + 7

Answer 2

Answer:

$a_{8}$ = - 14

Step-by-step explanation:

The n th term of an arithmetic sequence is

$a_{n}$ = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 7 and d = - 3, thus

$a_{8}$ = 7 + (7 × - 3) = 7 - 21 = - 14