## Functions

Skill Type Description Source
What is a function? Worksheet This introductory leaflet explains what is meant by a function, gives functional notation, and some simple examples MathsCentre
Limits of functions Booklet In this unit, we explain 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. We also explain what it means for a function to tend to a real limit as x tends to a given real.. MathsCentre
Polynomial functions Booklet Many common functions are polynomial functions. In this unit we describe polynomial functions and look at some of their properties MathsCentre
Composition of functions Booklet We can build up complicated functions from simple functions by using the process of composition, where the output of one function becomes the input of another. It is also sometimes necessary to carry out the reverse process, decomposing a complicated function.. MathsCentre
What is a function? Worksheet A quantity whose value can change is known as a variable. Functions are used to describe the rules which define the ways in which such a change can occur. The purpose of this leaflet is to explain functions and their notation Mathscentre
Introduction to functions Booklet A function is a rule which operates on one number to give another number. However, not every rule describes a valid function. This unit explains how to see whether a given rule describes a valid function, and introduces some of the mathematical terms asso.. MathsCentre
Inverse functions Booklet An inverse function is a second function which undoes the work of the first one. In this unit we describe two methods for finding inverse functions, and we also explain that the domain of a function may need to be restricted before an inverse function can.. MathsCentre
Introduction to funtions Video - 32 mins A function is a rule which operates on one number to give another number. However, not every rule describes a valid function. This unit also introduces some of the mathematical terms associated with functions MathTutor
Linear functions Video - 19 mins Some of the most important functions are linear. This unit describes how to recognize a linear function and how to find the slope and the y-intercept of its graph MathTutor

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