OpenStudy (anonymous):

Find an equation for the nth term of the arithmetic sequence. -15, -6, 3, 12, ...

5 years ago
OpenStudy (campbell_st):

well you know the 1st term a = -15 and the common difference is d = 9 so the general from is \[a_{n} = -15 + (n -1)\times 9\] distribute the 9 and simplify for the answer.

5 years ago