About
<math> e \approx 2:71828</math> is the scientific constant, the exponential. Euler's number
The number e is an important mathematical constant that is the base of the natural logarithm.
The number e can be defined to be:
- the unique real number a such that
<MATH> ln(a) = 1 </MATH>
- the limit of the below hyperbola as n approaches infinity,
<MATH> (1 + \frac{1}{n})^n </MATH>
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Property
e to anything is positive.
Inverse
ln is the inverse function.
<MATH> ln(e(x))=x </MATH>
Whenever you see exponentials the first thing you want to do is take the logs.