Steps to solve for logarithms:
1. Simplify out the exponential form to logarithm form
2. Use rules to simplify down
3. Get x by itself by dividing down
1. Simplify out the exponential form to logarithm form
2. Use rules to simplify down
3. Get x by itself by dividing down
Example #1
Practice #1
A. Know the base of the exponential form
B. Take the logarithm subscript to both sides with the same number as the base of the number in exponential form
C. Use the change of base formula listed below to simplify on one side
D. Simplify to get x by itself
B. Take the logarithm subscript to both sides with the same number as the base of the number in exponential form
C. Use the change of base formula listed below to simplify on one side
D. Simplify to get x by itself
Change of Base formula:
Example #2
Practice #2
The goal is to try to get the logarithm into exponential form.
Use your rules to combine and get rid of the logarithm by taking ten to the power of whatever the other side is at the time. (See examples)
Example #3
Practice #3
http://espn.go.com/video/clip?id=8974897