John Y.

asked • 06/11/15

Sequence questions final exam review questions that are giving me trouble.

1. For the sequence 3,7,11,15, ... find:
a)The value of the 15th term
b)sum of the first 11 terms
 I know it's easy just to keep adding by 4 until 15 but can you do it through the formula way? because on the exam I'm expecting big numbers. Thanks

2 Answers By Expert Tutors


John Y.

what if the common difference is a multipied number    example 2,6,18,...
common difference is?


Mark M.

If each term is multiplied by a "common ratio," you have a geometric sequence/series. It has its own set of formulas.


Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.