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Geometric Sequence Calculator

First term of the sequence (a1):
Common ratio (r):
Enter n:

About This Tool

This online Geometric Sequence Calculator is used to calculate the nth term and the sum of the first n terms of geometric sequence.

Geometric Sequence

In mathematics, a geometric sequence, also known as a geometric progression, 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. The sum of the numbers in a geometric progression is also known as a geometric series.

If the initial term of a geometric sequence is a1 and the common ratio is r, then the nth term of the sequence is given by:

an = a1rn-1

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