Khan/khan-exercises — pull request #54790 by midnoonmazes (2013-07-19 04:10:14+00:00)
Title: Added new possible exercise

Hi,
I created an exercise for this video: http://www.khanacademy.org/math/trigonometry/seq_induction/seq_and_series/v/sequences-and-series--part-1
It attempts to build on what is shown in the video by asking the student to evaluate a sum not starting from 1. Thanks.