Law of Logarithms

Logs (Unit 1)

By KASSIA! LLTTF

​Table of Contents

1. The Exponential Function - Slide 3

2. The Logarithmic function - Slide 5

3. Rules governing logs - Slide 8

4. ​Change of Base - Slide 9

5. Points to Note - Slide 10

6. Examples - Slide ​11

​

​1. The Exponential function

​2. The Logarithmic function

​Rules governing logs

​Change of Base

Note :

Log base is always positive with the exception of 1.

Common bases are e and 10.

Can't log a negative number but solving a log equation can give a negative value of x as the result.

​Examples (1)

​(2)

​(4) Solve the simultaneous equations

​(3)

(5)

(6)