Question

What is the 15th term of the arithmetic sequence 17, 24, 31, … ?

Answer 1

See below

Explanation:

This is an arithmetic sequence, so it must have a common difference:
`d=24-17=7`

Now to write formula to find the fifteenth term:
`a_15= a_1+7(15-1)`

`a_15= 17+98= 115`