An introduction to the change of base law for logarithms, as well as how it can be used to evaluate logarithms in any base using the common logs function on any scientific calculator, and how it can be used in simplifying logarithmic expressions.
See the rest of my videos covering other Exponential and Logarithmic Expressions and Equations concepts:    • ★ Exponential & Logarithmic Expressio...  

Corresponds to chapter 8, section 8.3 in McGraw-Hill's Pre-Calculus 12, but also fits with the exponents and logarithms unit from almost any other Pre-Calculus course or textbook.

My instructional approach emphasizes conceptual understanding of and connections between concepts and ideas, rather than just pure memorization.

A PDF copy of the 'Video Guide' document used in these videos as well as lots of other resources are available at https://drive.google.com/drive/folder...

#precalc12bytheaamg

00:00 Introduction
00:18 Discovering the Change of Base Rule
03:49 Log Law for Change of Base
04:32 Example 1: Evaluate a Logarithm Using the Change of Base (on a Calculator)
05:42 Example 2: Write a Logarithmic Expression Using a Different Base
07:24 Example 3: Simplify Expressions Using the Change of Base Law
09:33 Example 3b
13:08 Wrap-Up and End Screen