Question #87d49

Mar 4, 2017

$2$ and $6$

$f'(x) = (2x(x-4)-(x^2-12)(1))/(x-4)^2$

$= (x^2-8x+12)/(x-4)^2$

$f'$ exists for all $x$ in the domain of $f$ and

$f'(x) = 0$ at $2$ and at $6$

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