# The Product Rule

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If and are both differentiable at , then the derivative of their product at is given by the product rule shown above. On the graph, is blue, is red, is purple, and the derivative of is thick purple.

Contributed by: Chris Boucher (March 2011)

Open content licensed under CC BY-NC-SA

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detailSectionParagraph## Permanent Citation

"The Product Rule"

http://demonstrations.wolfram.com/TheProductRule/

Wolfram Demonstrations Project

Published: March 7 2011