# Equation for geometric series

We can prove that the geometric series converges using the sum formula for a geometric

## Finite geometric series formula (video)

Using the geometric sequence formulas, the sum of an infinite geometric sequence is, S_\infty

## Geometric Series and Geometric Sequences

r = 20. n = 10. The 10th term in the series is given by S 10 =. a ( 1 − r n) 1 − r = 2 ( 1 − 20 10) 1 −