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Properties of Logarithms

WEBSITE: This video explains three properties of logarithms and the Change of Base formula. The product property is that the sum of two logarithms of the same base is equal to the log of the product of those two numbers. The quotient property of logarithms is that the difference of two logarithms of the same base is equal to the logarithm of the quotient of those two numbers. If you have the logarithm of a number that has an exponent that exponent can be taken out and multiplied times the logarithm to make it an equivalent expression. The Change of Base formula is useful in determining values of logarithms with a base different than 10 or e the keys available on many calculators including the TI83 and TI84 series calculators.
Length: 06:12


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