Sequences, series and induction

An assortment of concepts in math that help us deal with sequences and proofs.

Geometric sequences

Review geometric sequences before you dive into geometric series.

Finite geometric series

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!


Proof by induction is a core tool. This tutorial walks you through the general idea that if 1) something is true for a base case (say when n=1) and 2) if it is true for n, then it is also true for n+1, then it must be true for all n! Amazing!