What are functions ? From an introduction of the basic concepts of functions to more advanced functions met in economics, engineering and the sciences, these topics provide an excellent foundation for undergraduate study.

# Limits of sequences

This unit introduces finite and infinite sequences, and explains what it means for two sequences to be the same and what is meant by the n-th term of a sequence. The divergence of an infinite sequence to plus or minus infinity, or its convergence to a real limit, is considered. Video tutorial 18 mins.