Exponential Function, Real

The function $y=e^x$, also denoted by $y=\exp x$. Sometimes the function $y=a^x$ for any base $a>0$ is also called an exponential function.

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See also Exponential function; Exponent; $e$ (number). The inverse of the exponential function is the logarithmic function (cf. also Logarithm of a number). The value of the exponential function at a point is also called the antilogarithm of this point.