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exponential function

noun Mathematics.
  1. the function y = ex.
  2. any function of the form y = bax, where a and b are positive constants.
  3. any function in which a variable appears as an exponent and may also appear as a base, as y = x2x.
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Origin of exponential function

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018