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Geometric Sequence Sum

Free online geometric sequence sum calculator (first n terms).

Tool Guide

Tool Overview

The Online Geometric Sequence Sum Calculator can calculate the sum of the terms of a specified geometric sequence.

Geometric sequence general term formula: a n = a 1 *q (n-1)

a1 - first term

n - number of terms

q - common ratio

Geometric sequence sum of the first N terms formula: S n = a 1 (1-q^n)/(1-q)