SOLUTION: Find an equation for the nth term of the arithmetic sequence. -15, -6, 3, 12, ... choices below an = -15 + 9(n + 1) an = -15 x 9(n - 1) an = -15 + 9(n + 2) an

Algebra ->  Trigonometry-basics -> SOLUTION: Find an equation for the nth term of the arithmetic sequence. -15, -6, 3, 12, ... choices below an = -15 + 9(n + 1) an = -15 x 9(n - 1) an = -15 + 9(n + 2) an      Log On


   

Question 1135559: Find an equation for the nth term of the arithmetic sequence.
-15, -6, 3, 12, ...
choices below
an = -15 + 9(n + 1)

an = -15 x 9(n - 1)

an = -15 + 9(n + 2)

an = -15 + 9(n - 1)
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

There are introductory lessons on arithmetic progressions
    - Arithmetic progressions
    - The proofs of the formulas for arithmetic progressions
    - Problems on arithmetic progressions
    - Word problems on arithmetic progressions
in this site.

Learn the subject from there.

Then you will be able to solve such problems on your own.