CHAPTER_ppt_12_4

# CHAPTER_ppt_12_4 - Â 12.4 Logarithmic Functions Martin-Gay...

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Unformatted text preview: Â§ 12.4 Logarithmic Functions Martin-Gay, Beginning and Intermediate Algebra, 4ed 2 If we graph an exponential function where the base > 1, we get an increasing function, as shown below. x y Graph of a Exponential Function Martin-Gay, Beginning and Intermediate Algebra, 4ed 3 We can graph the inverse of the function, as shown below. x y This inverse function is referred to as a logarithmic function . Graph of a Logarithmic Function Martin-Gay, Beginning and Intermediate Algebra, 4ed 4 Logarithmic Definition If b > 0 and b â‰  1, then y = log b x means x = b y for every x > 0 and every real number y . Logarithmic Functions Martin-Gay, Beginning and Intermediate Algebra, 4ed 5 Write each of the following as an exponential equation. a) log 4 16 = 2 4Â² = 16 b) log 8 â…› = â€“ 1 3 c) log 3 = Â½ 8 â€“ 1 = â…› 1/2 3 3 = Writing Exponential Functions Example: Martin-Gay, Beginning and Intermediate Algebra, 4ed 6 Write each of the following as a logarithmic equation....
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CHAPTER_ppt_12_4 - Â 12.4 Logarithmic Functions Martin-Gay...

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