1. Today in Precalculus
Notes: Log properties and using log properties to expand logarithmic expressions (no handout, no calculators needed)
Go over quiz
Homework

2. Properties of logs Similar to laws of exponents:
logauv = logau + logav log34x=log34+log3x
logaun = nlogau log2x7=7log2x

3. Expanding Log Expressions
Use the properties of logs to rewrite one log expression into multiple log terms.
Example: Expand log812y
Example: Expand log7x2y

5. Practice

6. Homework
Go over quiz
Page 317: all

7. = log2x½ + log2y4 - log2z4
= ½ log2x + 4log2y - 4log2z

8. = log10z - log104
= ln6 – ln(x2+1)½
= ln6 – ½ln(x2+1)