**Logarithm - Wikipedia**
https://en.wikipedia.org/wiki/Logarithm

OverviewMotivationDefinitionLogarithmic identitiesParticular basesHistoryLogarithm tables, slide rules, and historical applicationsAnalytic propertiesIn mathematics, the logarithm is the inverse function to exponentiation. That means the logarithm of a number x to the base b is the exponent to which b must be raised, to produce x. For example, since 1000 = 10 , the logarithm base 10 of 1000 is 3, or log10 (1000) = 3. The logarithm of x to base b is denoted as logb (x), or without parentheses, logb x, or even without the explicit base, log x, wh…

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