RE: How to calculate the relative extrema of a cubic function by applying the criterion of the first derivative?
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since the objective of this one was to use the criterion of the first derivative.
My comment was trigger by exactly that thought. As I said, it can be misleading if the second is zero as well. In that case you might think you found an extreme while you are actually hitting on a saddle. While at it I added the discussion point about the difference between max and min.
Sorry if that was too exhausting, once I get triggered by math I cannot resist :-P
!BBH
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Hello friend, of course I understand you, we are in contact, thanks for encouraging a good debate.