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The Product Rule

AP Calculus AB· difficulty 3/5

f g

By the product rule, ddx[fg]\dfrac{d}{dx}[fg] equals:

  • A

    f′g−fg′g2\dfrac{f'g - fg'}{g^2}

  • B

    f′g′f'g'

  • C

    f′g−fg′f'g - fg'

  • D

    f′g+fg′f'g + fg'

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Explanation

Product rule: (fg)′=f′g+fg′(fg)' = f'g + fg'.

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