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In this video we talk about justifying points of inflection, specifically on the AP Calculus Exam but everything is valid for any calculus class you might be taking. We go over how you’re likely to see the questions (either given a function of some sort or a graph of the first derivative) and how to justify in any circumstance. Sometimes we find the second derivative; sometimes we just base it on the graph of the first derivative. This is a really common thing to do on the free response questions (FRQs) and knowing what to do on the way into the exam will make you faster at doing it!