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Natural logarithm

A natural logarithm has the number e as base. You write it as

 


Explanation

Actually, a logarithm is a "stray" exponent. The definition of the logarithm is

eln x = x

 


History

In 1668 the German mathematician Nicholaus Mercator used the Latin name "logarithmus naturalis" in his treatise Logarithmo-technica.


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