5.5Logarithms. Objectives: I will be able to…  Rewrite equations between exponential and logarithmic forms  Evaluate logarithms  Solve logarithms Vocabulary:

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Presentation transcript:

5.5Logarithms

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

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

Two special types of logarithms: Logarithmic Function

base number exponent

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

Logarithmic Function

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

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

p #11, 12, 14, 17, even Homework

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