Question

The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.

8/9
1.8
2

Answer 1

What do you think? :)

Answer 2

I know its not 1.8 and I'm thinking maybe its 8/9 but im not for sure

Answer 3

What makes you say it's not 1.8?

Answer 4

I've done the assignment once before and it wasn't the correct answer.

Answer 5

have you consider using the equation definition of arithmetic sequence ?

Answer 6

Im not sure how to do that. Math isn't my strong point :/

Answer 7

can you state the equation definition of arithmetic sequence ?

Answer 8

\[a_n=....\]