1. 6.3 Logarithmic Functions
Today’s Date:
1/31/18

2. Logarithmic Functions (Inverse of exponential function)
(Go around the world)

3. Logarithms Facts: Features: Domain: set of positive Range:
See graphs in next 2 examples

4. Example 1 Graph x y Plug values into y 2-2 = 1/4 -2 2-1 = 1/2 -1 20 =
21 = 2 1
Typical graph of log function with a > 1
22 = 4 2

5. Example 2 Graph x y Plug values into y (1/2)-2 = 4 -2 (1/2)-1 = 2 -1
(1/2)0 = 1
(1/2)1 =
1/2 1
Typical graph of log function with 0< a < 1
(1/2)2 =
1/4 2

6. Properties of Logs

7. Examples 3) 4)
Change to exp form
Write as same base

8. Examples 5)
(Bases are always positive ) 6)

9. Homework
#603 Pg – 59 odd