Functions, domain, range, inverse

Exam specification: Edexcel > Maths A-level > C3 > Algebra and functions

Definition of a function. Domain and range of functions. Composition of functions. Inverse functions and their graphs.

The concept of a function as a one-one or many-one mapping from R (or a subset of R) to R. The notation f : x and f(x) will be used.

Students should know that fg will mean ‘do g first, then f '.

Students should know that if f^?1 exists, then f ^?1f(x) = ff ^?1(x) = x.

Contents: [tpcfuncbasicmlst]

• RFunctions, domain, range, inverse

Exercises: [tpcfuncbasicxlst]