Lesson Summary (February 26th 2013)

Morning Lesson:

We learnt how to solve logarithms using different methods.

Method 1: Covert log form to exponential form.
Method 2: Use change of base formula first.

For example:

Afternoon Lesson:

From the tables we have calculated out, we can conclude that:

- Power:   log_a (x^p) = p log_a x

-  Product: log_a (xy) = log_a x + log_a y

- Quotient:  

A formula can also be inputed into your graphic calculator to help change base:

Sorry I will input the formula when I get the paper back ><

Otherwise, you can use this log rule to change base too:

- Change of base formula: 

http://www.mathwords.com/c/change_of_base_formula.htm

Things to take note:

log_a (x + y) ≠ log_a x + log_a y

log_a (x – y) ≠ log_a x – log_a y