Question: help please whether they are local maxima, minima, or neither. Exercise 7.7.7 Use second derivatives to find the local minima and maxima of the following

help please

whether they are local maxima, minima, or neither. Exercise 7.7.7 Use second derivatives to find the local minima and maxima of the following functions: a ) f (X ) = X3 - 3X2 - 9X - 2 b ) f (X ) = 4X4 - 5X3 - 36X2-60 c ) f ( X ) = ( X + 2) 2 ( X - 1 ) 2

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