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Find all critical numbers:

(x^2+12)(9-x^2)?
14 years ago

Answers

Michael
ok. well first of all, use the product rule: f(x)g'(x) + g(x)f'(x) then set the derivative = to 0

(x^2 +12)(-2x) + (9-x^2)(2x)=0
14 years ago

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