the sum of the first 15 terms for the geometric sequence 2, 8, 32, ... is 43690
In mathematics, a geometric sequence (also called a geometric progression) is a sequence of nonzero numbers where each term after the first multiplies the previous term by a fixed nonzero number called the common ratio It is required by
The common ratio of each term multiplied to get a next term is a non-zero number. Examples of geometric progressions are 2, 4, 8, 16, 32, and 64, ... where 2 is the common ratio.
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