Infinite geometric series?

Converges if |r| < 1: S = a/(1-r).

Summation Calculator

Calculate sum of arithmetic and geometric series

First Term

Common Difference/Ratio

Number of Terms

Type

Arithmetic: S = n(a₁+aₙ)/2

Sum formulas for arithmetic and geometric series.

Sum = 55.

Calculate sums of arithmetic and geometric series.

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