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Calculus - Differentiation - the Product Rule.

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The Product Rule is the second of the three principal techniques used to differentiate a function - after straightforward techniques on a variable. We recognise the structure of a function to which we would apply the Product Rule as comprising:

• two terms with an independent variable and at least one of the terms inside brackets;
  the bracket (or brackets) is raised to a power - positive or fractional. The power rarely has a value of 2.
  Negative indices could be used but normally that case is addressed by our third technique - that of the Quotient Rule.
  
  
• the two terms are multiplied together.

The following table summarises, with the relevant links, the pages and videos relevant to learning about and evaluating your competency with the Product Rule.

About the Link	Media type
Technique for the Product Rule with examples.	Video
Test Yourself - Test 1	Web page.
Solutions to Test Yourself 1	Web page with comments.