A. Definition

geometric series  the expression formed by adding the terms of a geometric sequence.
B. Finding the Sum of the First n Terms of a Geometric Sequence.
 Use S_{n} = [(1  r^{n})/(1  r)], S_{n} is the sum of the first n terms.
 Substitute the n, a, and r values into S_{n} = [(1  r^{n})/(1  r)].
 Simplify to find the sum.
