2. The following slides contain repeats of information on earlier slides, shown without colour, so that they can be printed and photocopied.
For most purposes the slides can be printed as “Handouts” with up to 6 slides per sheet.

3. e.g. Write the following in a form using logarithms:
(b)
e.g. Write the following without using logarithms:
Solution: (a)
Solution:

4. Simplifying Logs
e.g. 2. Simplify (a) (b)
(b)
Solution: (a)

5. There are 2 special cases we can get directly from the definition of a log.
Let x = 0,
2 useful results
So,
By the law of indices,
for all values of the base

6. Let b = a,
x = 1
Then
So,

7. Three Laws of Logarithms
The Definition of a Logarithm
SUMMARY