Ex: Concavity / Points of Inflection by Analyzing a Graph (Algebra Topic)

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This video explains how to determine if the graph of a function is concave up or concave down using algebra, not calculus.
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soooo.... how do you get the intervals for concave up and down -.- 

johnzrock
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Still don’t get how u got the intervals for the cóncaves

osac
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Oh no, my guy, you're getting hated on right now.

thatrecord