SOLUTION: Find the 15 th term in the sequence 0, 3, 8, 15, 24, 35, ..... any formula to solve this?

Algebra ->  Sequences-and-series -> SOLUTION: Find the 15 th term in the sequence 0, 3, 8, 15, 24, 35, ..... any formula to solve this?      Log On


   

Question 1030673: Find the 15 th term in the sequence 0, 3, 8, 15, 24, 35, .....
any formula to solve this?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The general formula would be a%5Bn%5D+=+%28n-1%29%28n%2B1%29+=+n%5E2+-+1%29 for n = 1, 2, 3,4,...
==> a%5B15%5D+=+15%5E2+-+1+=+225-1=224.