Geometric Sequence

Pronunciation: /ˌdʒi əˈmɛt rɪk ˈsik wəns/ ?

A geometric sequence is a sequence of numbers with a common ratio.

For example, the geometric sequence { 1, 3, 9, 27, ... } has a common ratio of 3 since 1·3 = 3, 3·3 = 3, and 9·3 = 27.

A geometric sequence is also called a geometric progression. A geometric sequence is the same thing as a geometric progression.


  1. Jones, Burton. Elementary Concepts of Mathematics, pp 124-133. MacMillan and Company, 1947. (Accessed: 2010-01-12).
  2. Underwood, Ralph S.; Nelson, Thomas R.; Selby, Samuel. Intermediate Algebra, pp 227-232. The Macmillan Company, 1947. (Accessed: 2010-02-06).

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Geometric Sequence. 2010-02-06. All Math Words Encyclopedia. Life is a Story Problem LLC.


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Revision History

2010-02-06: Added "References" (McAdams, David.)
2008-08-02: Added paragraph on geometric progression. Added More Information (McAdams, David.)
2007-07-12: Initial version (McAdams, David.)

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