natural exponential function

Also known as exponential function, exp, exp(), exp(x), e^x, exp x

exponential function with base e, denoted exp(x) or e^x

Key facts

General definition: exp ⁡ z = e z {\displaystyle \exp z=e^{z}}
Domain: C {\displaystyle \mathbb {C} }
Image: { ( 0 , ∞ ) for z ∈ R C ∖ { 0 } for z ∈ C {\displaystyle {\begin{cases}(0,\infty )&{\text{for }}z\in \mathbb {R} \\\mathbb {C} \setminus \{0\}&{\text{for }}z\in \mathbb {C} \end{cases}}}
Value at 1: e
Fixed point: − W n (−1) for n ∈ Z {\displaystyle n\in \mathbb {Z} }
Reciprocal: exp ⁡ ( − z ) {\displaystyle \exp(-z)}
Inverse: Natural logarithm , Complex logarithm
Derivative: d d z exp ⁡ z = exp ⁡ z {\displaystyle {\frac {\mathrm {d} }{\mathrm {d} \!\,z}}\exp z=\exp z}
Antiderivative: ∫ exp ⁡ z d z = exp ⁡ z + C {\displaystyle \int \exp z\,dz=\exp z+C}
Taylor series: exp ⁡ z = ∑ n = 0 ∞ z n n ! {\displaystyle \exp z=\sum _{n=0}^{\infty }{\frac {z^{n}}{n!}}}

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Wikidata facts

Image: Exp e.svg

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Stack Exchange tag: stackoverflow.com/tags/exp
Commons category: Natural exponential function
Commons gallery: Natural exponential function

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Article

In mathematics, the exponential function is the unique real function which maps zero to one and has a derivative everywhere equal to its value. It is denoted ⁠