1. 10-2 Logarithms and Logarithmic Functions
Objective:
To write exponential equations in logarithmic form and vice versa.
To evaluate logarithmic expressions.
To solve equations and inequalities involving logarithmic functions.

2. A logarithm is a power.

3. Simply put a logarithm is a question:
This is asking 3 to what power is 81?
So the answer is …

4. Exponential Form
Logarithmic Form
So in logb N = k, b and N cannot be negative.

5. Shortcuts

6. Shortcuts:
Slide and Switch

7. Example 1
Write in exponential form: a) b) c)

8. Example 2
Write in logarithmic form: a) b) c)

9. Example 3 a)

10. Example 3 b)

11. Example 3 c)

12. Example 4
Solve a)

13. Example 4
Solve b)

14. Assignment
10-2 pg 609 #22-44 even