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This question is killing me. I Have a final coming up and need the answer to this.enter image description here

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Hint: $$f(x) = A'(x)$$

At what points does $\quad f(x) = A'(x) = 0\quad$ ?

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Very nice hint +1 – Amzoti May 20 '13 at 1:02

Hint: They are the $x$-intecepts.

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