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    i haven't done differentiation for a while now...could someone double check these rule for me? much appreciated

    chain rule:

    \frac{dy}{dx} = \frac{du}{dx} \times \frac{du}{dy}

    product rule:

    \frac{dy}{dx} = v\frac{du}{dx} + u\frac{dv}{dx}

    quotient rule:

    \frac{dy}{dx} = \frac{v\frac{du}{dx} + u\frac{dv}{dx}}{v}
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    The chain rule is incorrect:

     \frac{dy}{dx} = \frac{dy}{du} \times \frac{du}{dx} .

    For the quotient rule, it should be over  v^2 , and it should be a minus on the top, not a plus.
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    Your quotient rule is wrong.
    Should be a minus in the middle, and the denominator should be squared.
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    thanks v much
 
 
 
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Updated: June 7, 2008

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