1. 8.4 defn of logarithms.notebook January 31, 2013
8.4 Definition of Logarithms
Exponential Form Logarithmic Form
23 = 8 log28 = 3
24 = 16 log216 = 4
20 = 1 log 1 = 0
2
2­1 = 1/2
log21/2 = ­1
2k = N log N = k
2
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2. 8.4 defn of logarithms.notebook January 31, 2013
Write the equation in exponential form.
1. log636 = 2 2. log22 = 1 3. log10(0.001) = ­3
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3. 8.4 defn of logarithms.notebook January 31, 2013
Write each equation in logarithmic form.
4. 60 = 1 5. 8­2/3 = 1/4 6. 53/2 = 5√5
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