Math Precalculus Sequences, series and induction Finite geometric series 3 videos 1 skill Whether you are computing mortgage payments or calculating how many users your website will have after a few years, geometric series show up in life far more than you imagine. This tutorial will review all the important concepts and more! 2:53 Introduction to geometric series VIDEO 2:53 minutes Think about a geometric series as the sum of a geometric sequence. 4:28 Introduction to geometric series with sigma notation VIDEO 4:28 minutes Sal extends the idea of geometric sequences to geometric series. 9:38 Deriving the formula for the sum of a finite geometric series VIDEO 9:38 minutes Evaluating finite geometric series PRACTICE PROBLEMS Evaluate finite geometric series given in sigma notation, recursively, or explicitly.