In mathematics, a

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**geometric progression**, also known as a geometric sequence, is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio. For example, the sequence 2, 6, 18, 54, ... is a**geometric progression**with common ratio 3. Similarly 10, 5, 2.5, 1.25, ... is a geometric sequence with common ratio 1/2. The sum of the terms of a**geometric progression**, or of an initial segment of a**geometric progression**, is known as a geometric series. Wikipedia, Geometrical ProgressionSee Also

**arithmetical progression****Cause and Its Effects****exponentiation****progression****12.18 - Multiple Octave Progression**