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logarithm
logarithm A logarithm is the exponent that tells how many times a base number must be used as a power to produce a given number.
A logarithm is the exponent that tells how many times a base number must be used as a power to produce a given number. For example, with base 10, the logarithm of 1,000 is 3 because 10 to the third power equals 1,000.