exponential
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Exponential
In mathematics, descriptive of a function in which the variable quantity is an exponent (a number indicating the power to which another number or expression is raised).
Exponential functions and series involve the constant e = 2.71828.... . Scottish mathematician John Napier devised natural logarithms in 1614 with e as the base.
Exponential functions are basic mathematical functions, written as ex or exp x. The expression ex has five definitions, two of which are: (i) ex is the solution of the differential equation dx/dt = x (x = 1 if t = 0); (ii) ex is the limiting sum of the infinite series 1 + x + (x2/2!) + (x3/3!) + ... + (xn/n!).
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