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

By:

Mark M. answered • 06/11/15

Mathematics Teacher - NCLB Highly Qualified

John Y.

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

06/18/15

Mark M.

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

06/21/15

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