Contents

1. Logarithm Ideas

1.1 A Key Idea

1.2 Three Related Ideas

1.3 Formal Definitions

1.4 Test Your Knowledge

2. Logarithm Laws

2.1 Turning Multiplication into Addition

2.2 Further Laws

2.3 Change of Base

2.4 Exponential and Logarithm Graphs

2.5 Logarithm Scales and Slide Rules