A logarithm of a reciprocal.
For example, log(1/7) or log(7-1) = -log(7)
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The natural logarithm is the logarithm having base e, whereThe common logarithm is the logarithm to base 10.You can probably find both definitions in wikipedia.
The logarithm of a number with base=B is written as [ logB(N) ].If the base is 10, it's called the "common logarithm" of N and the base isn't written. [ log(N) ].If the base is 'e', it's called the "natural logarithm" of N, and written [ ln(N) ].
A natural logarithm or a logarithm to the base e are written as: ln(X) as opposed to loge(X)
Domain of the logarithm function is the positive real numbers. Domain of exponential function is the real numbers.
A "natural logarithm" is a logarithm to the base e, notto the base 10. Base 10 is sometimes called "common logarithm". The number e is approximately 2.71828.