COM 1013 BUSINESS MATHEMATIC
CHAPTER 03
PART I
INTRODUCTION TO FUNCTIONS
Prepared By S Sri
, LEARNING OUTCOMES
Explain the term, function
Recognise when a rule describes a valid funct
Evaluate the function value
Find a suitable domain for a function, and find
corresponding range
, WHAT IS A FUNCTION?
A function is rule for a relationship between an inpu
independent) quantity and an output (or dependent) quant
which each input value uniquely determines one output value
It is said the output is a function of the input.
In other words, a function is a rule which maps a numbe
another unique number.
For example, we might have a function that added 3 to
number.
So if we apply this function to the number 2, we get the numb
If we apply this function to the number 8, we get the number
If we apply this function to the number x, we get the number
We can show this mathematically by writing
f(x) = x + 3
CHAPTER 03
PART I
INTRODUCTION TO FUNCTIONS
Prepared By S Sri
, LEARNING OUTCOMES
Explain the term, function
Recognise when a rule describes a valid funct
Evaluate the function value
Find a suitable domain for a function, and find
corresponding range
, WHAT IS A FUNCTION?
A function is rule for a relationship between an inpu
independent) quantity and an output (or dependent) quant
which each input value uniquely determines one output value
It is said the output is a function of the input.
In other words, a function is a rule which maps a numbe
another unique number.
For example, we might have a function that added 3 to
number.
So if we apply this function to the number 2, we get the numb
If we apply this function to the number 8, we get the number
If we apply this function to the number x, we get the number
We can show this mathematically by writing
f(x) = x + 3
