1. 5.5Logarithms

2. Objectives: I will be able to…  Rewrite equations between exponential and logarithmic forms  Evaluate logarithms  Solve logarithms Vocabulary: logarithms, natural logarithms

3. Why learn about logarithms? 5.1-5.4 were all about exponents A logarithm is the inverse of an exponent We can use logarithms to solve for a missing exponential value

4. Two special types of logarithms: Logarithmic Function

5. base number exponent

6. RewriteExponents ⟶ Logs b = 6 x = 216 b = 10 x =.01 b= e x =.0498

7. Logarithmic Function

8. If not an equation, let log equal y as in general form. =y No base means base 10. =y 10 e

9. Logarithmic Function Change form of logarithm. Change form of 729. Use exponent rules. Not matching exponents, must get rid of exponent with x.

10. p. 194-195 #11, 12, 14, 17, 36-42 even Homework

11. Exit Ticket