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magmagod · 10-24-2010

Use an algebric strategy to verify that the point given for each function is either a maximum or a minimum.

x^3-3x ; (-1, 2)

so i tried finding the instantaneous rate of change before -1 and after -1 to see if its a maximum or a minimum, since if its a local max before -1 would be positive and after would be negative but i couldn't reach the solution in the back of the book. any help would be appreciated.

the formula i used was the difference quotient.

10-24-2010	#1
magmagod Join Date: Mar 2010 Posts: 9	Rates of change question Use an algebric strategy to verify that the point given for each function is either a maximum or a minimum. x^3-3x ; (-1, 2) so i tried finding the instantaneous rate of change before -1 and after -1 to see if its a maximum or a minimum, since if its a local max before -1 would be positive and after would be negative but i couldn't reach the solution in the back of the book. any help would be appreciated. the formula i used was the difference quotient.