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An exponential function is a function of the form f(x) = ax where a is a positive constant called the base of the function.

The natural exponential function is the inverse of the natural logarithm. It is written as exp x or ex. Thus y = ex means the same as x = ln y.

For a a positive number, the exponential function ax is defined to be ax = ex ln a .


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Copyright © 2006 Darel Hardy, Fred Richman, Carol Walker, Robert Wisner. All rights reserved. Except upon the express prior permission in writing, from the authors, no part of this work may be reproduced, transcribed, stored electronically, or transmitted in any form by any method.

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