Calculus I - Product and Quotient Rule
May 26, 2020 · Product Rule. If the two functions f (x) f ( x) and g(x) g ( x) are differentiable ( i.e. the derivative exist) then the product is differentiable and, (f g)′ =f ′g+f g′ ( f g) ′ = f ′ g + f g ′. The proof of the Product Rule is shown in the Proof of Various Derivative Formulas section of the Extras chapter.
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