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### Geometric Sequence?

```
Date: 03/21/97 at 11:17:03
Subject: Geometric Sequence?

Sequence: 1, -1, 1, -1, 1, -1,...
Is it a geometric sequence?
Thanks :)
```

```
Date: 03/21/97 at 11:30:46
From: Doctor Rob
Subject: Re: Geometric Sequence?

Yes, it is.  A geometric progression is one of the following form:

a, a*r, a*r^2, a*r^3, ..., a*r^n, ...

The ratio of each term to its predecessor is a constant r.  That is
the definition of a geometric progression.

In this case, a = 1, r = -1.

-Doctor Rob,  The Math Forum
Check out our web site!  http://mathforum.org/dr.math/
```
Associated Topics:
High School Sequences, Series

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