The product rule is used to differentiate products of two functions that cannot be expanded easily.
It is an important rule that is used extensively in calculus. In the tutorial I show you what it is and how to use it.

Differentiation - The Product Rule : ExamSolutions Maths Revision - youtube Video

Summary Exercise

Differentiation - Product Rule - Summary Exercise : ExamSolutions Maths Revision - youtube Video

Proof of Product Rule

Proof of the Product Rule for Differentiation : ExamSolutions Maths Revision - youtube Video