Exponential function
The exponential function is the function , exponentiation by e. It is a very important function in analysis, both real and complex.
Exponential functions are functions that grows or decays at a constant percent rate. Exponential functions that result in an increase of y is called an exponential growth. Exponential functions that result in an decrease of y is called an exponential decay.
Exponential functions are in one of three forms. ,
, where e is the irrational constant 2.71828182846...., or
, where h is the half-life (for decay), or d is the doubling time (for growth).
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