User:Lizynavin/My sandbox/Maths

= Relations and Functions =

Representation of Relations

 * Set Notation
 * Mapping Diagram
 * Tables
 * Graph

Function Notation
The symbol f(x) is read as "the value of f atx"  or simply " ''f of x ". It doesnot mean f times x. f(x) ''is called the &lt;u&gt;function notation.

Evaluating a Function
Consider the function f(x) .To evaluate f(a)


 * 1) Replace all x`s witha in the definition of f(x)
 * 2) Simplify the expression

 Example :  Let f(x) = 2x -3 .Find f(-1)

Solution :f(-1) = 2(-1) -3

= -2-3

= -5