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Published byJoel Phillips Modified over 7 years ago
Section 5.3 Properties of Logarithms Advanced Algebra
Properties of Logarithms log b 1 = 0 Anything raised to the 0 power is 1. log b b = 1 Anything raised to the 1st power is that anything log b b x = x Think about as exponent: b x = b x Rewrite as a log: log b x = log b x
Common and Natural Log Properties log 1 = 0 log 10 = 1 log 10 x = x 10 log x = x x > 0 ln 1 = 0 ln e = 1 ln e x = x e ln x = x if x > 0
Simplify Using Properties
3 More Properties Product Rule log b MN = log b M + log b N Quotient Rule Power Rule
Write as a sum or difference of logs
Expand as a sum and difference of logs
Expand the log into a sum or difference of logs
Write the difference as a single log
Write the sum as a single log To use the product or quotient rules of logs, remember, the bases must be the same.
Combine into a single log
Condense to a single logarithm
Evaluate log 4 5 Change of Base Formula
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