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Inflection points. What to do if the second derivative does not exist? Is there a possibility that there is still an inflection? The answer is yes. In this lesson we introduce the concepts of concave and convex function at a point, and the inflection point itself. We will also introduce sufficient conditions for the existence of inflection points using the tools provided by mathematical analysis. The examples given will clarify the concepts better. #salvoromeo #concavity #flexions