# User:Lizynavin/My sandbox

From WikiEducator

# Relations and Functions

## Relations

### A **relation** is defined to be any set of ordered pairs.

**relation**

## Representation of Relations

- Set Notation

- Mapping Diagram

- Tables

- Graph

## Functions

A relation in which corresponding to every input , there is only one output is called a **function.**

**function.**

Function Notation

The symbol f(x) is read as "the value of *f at x*" or simply " *f of x *" . It doesnot mean f times x. f(x) is called the **function notation**.

## Evaluating a Function

Consider the function f(x) .To *evaluate f(a)*

- Replace all x`s witha in the definition of f(x)
- Simplify the expression

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

# Links

An orientation course on Learning4Content is conducted at Sacred Heart College ,Thevara

http://elearning-rajettan.blogspot.com

# Images

# Boxes and Borders

## The Rules for Differentiation

- Constant Multiplie Rule
- Sum and difference Rule
- Product Rule
- Quotient Rule
- Chain Rule