This calculus video tutorial explains how to find the local maximum and minimum values of a function. In order to determine the relative extrema, you need to find the first derivative, set it equal to zero, and solve for x which represents the critical numbers of the function. You need to put these numbers on a number line and create a sign chart. According to the first derivative test, if the sign changes from - to +, it’s a relative maximum. If it changes from + to -, it’s a relative minimum. This video contains plenty of examples and practice problems for you to work on.
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