In this video I go through basically everything you really need to know about local and absolute maximums/minimums, critical points/numbers and how to determine the absolute max or min of a function using the closed interval method. This is pretty basic but nonetheless extremely important to understand as it is used in many real world applications, including your calculus exam.

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Local Max/Min, Absolute Max/Min, Critical Points/Numbers

Local Maximum / Minimum

Absolute Maximum / Minimum

Critical Points / Numbers

A critical point or number is a number, c, such that f'(c) = 0 or does not exist.

Closed Interval Method

Example

Solution: