Exponentials and logarithms. Lecture 2.1

1. Lecture 2.1 Exponentials and Logarithms

Foundation Year Program
NUFYP Mathematics
Lecture 2.1
Exponentials and Logarithms
Lecture slides prepared by:
Robert Farrell
Gonçalo Pinto
Rustem Iskakov
2019-2020

2. Lecture Outline

Foundation Year Program
Lecture Outline
Exponent
Exponential function
Graphs of exponential functions
Logarithm
Graphs of logarithmic functions
Laws of logarithms
2019-2020

3. Introduction

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Introduction
What is exponent?
What is the basic idea of exponentiation?
2019-2020

4. Introduction

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Introduction
What is exponent? Exponent is an index or power.
What is the basic idea of exponentiation?
2019-2020

5. Introduction

Foundation Year Program
Introduction
What is the basic idea of exponentiation?
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6. Introduction

Foundation Year Program
Introduction
What is the basic idea of exponentiation?
Repeated
addition
Repeated
multiplication
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2019-2020

7.

Foundation Year Program
Exponential function
An exponential function has the form
Exponent, index, power
(variable)
f(x) = ax
• where a is constant
• a ≠1, a > 0
Examples:
base
f (x) = 2x , f(x) = 3x , f(x) = ex
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8.

Foundation Year Program
2.1.1 Sketch the graph of Exponential function
Let us see some graphs of exponential functions with
different bases on the same axes:
The larger the base ⇾ steeper the graph
y-intercept (0; 1)
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2019-2020

9.

Foundation Year Program
An exponential function has the form
Exponent, index, power
(variable)
Why a ≠1?
f(x) = ax
• where a is constant
• a ≠1, a > 0
base
Examples: