Logarithm

  • A logarithm for a given base (b) is the inverse of taking that base to the power of a value, such that log(b^x) = x. A log can have any value as a base. The most common bases are 10 and the mathematical constant e, which is the base for the natural logarithm.PlanetMath.org: Logarithm WolframMathWorld: Logarithm
  • Rules of Logarithms

    • These rules apply to logarithms with a base of x:
      • log(ab) = log(a) + log(b)
      • log(a/b) = log(a) - log(b)
      • log(a^b) = b * log(a)
      • log(1) = 0
      • log(x) = 1PlanetMath.org: Logarithm

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