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 functions

This unit explains what it means for a function to tend to infinity, to minus infinity, or to a real limit, as x tends to infinity or to minus infinity. A function which tends to a real limit as x tends to a given real number is also discussed. Video tutorial 17 mins.