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Math Help - Help with derivatives

  1. #1
    Junior Member
    Joined
    Nov 2007
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    Help with derivatives

    I tried deriving this 3 times but i'm not getting the right answer. Can you please help me derive this
    \frac {-48t}{(12 + t^2)^2}
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  2. #2
    Senior Member topher0805's Avatar
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    Recall the quotient rule:

    f'(\frac {a}{b}) = \frac {ba'-ab'}{b^2}

    Does this help?
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