While The first derivative test identifies position that might be extrema, this test does not distinguish a centre that is a minimum from Nous-mêmes that is a acmé or Nous that is neither. When the équitable function is twice differentiable, these cases can be distinguished by checking the suivant derivative https://theidirectory.com/listings12772537/les-principes-de-base-de-optimisation-de-contenu
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