Question

Find the 8th term of the arithmetic sequence if a1=4, d=5

Answer 1

Well first off you need to know how to set up the equation. That equation being: an = a1 + (n - 1) d. Now we can just plug in our given numbers. (remember the nth term is 8) So, a8 = 4 + (8 - 1) 5. Simplify using PEMDAS.

First add what's in the parenthesis: a8 = 4 + (7) * 5 4 + 35.
Then multiply: a8 = 4 + 35.
Lastly add: a8 = 39.

So the 8th term of the arithmetic sequence is 39

Answer 2

For school