Find the maximum value of I tried differentiating to find the turning point and got Plugging in x=0 i got 9... but the answer says the maximum is 2?

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Originally Posted by DivideBy0 Find the maximum value of I tried differentiating to find the turning point and got Plugging in x=0 i got 9... but the answer says the maximum is 2? The derivative of a constant is 0, so To find a local min/max you set the derivative to 0, not x. So setting this to 0 and solving I get: (There is no "nice" exact value for .) Plugging this back into f(x) I get: -Dan

Oops i made 2 mistakes, thanks topsquark

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