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Math Help - Partial derivative..

  1. #1
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    Partial derivative..

    Just wondering how exactly this works...

    dy/dx . (partial derivative)df/dr

    =

    dy/dx . x/r


    I'm assuming I use the chain rule..? if so what substitution do i need to make..and how does this work..?
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  2. #2
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    Quote Originally Posted by dankelly07 View Post
    Just wondering how exactly this works...

    dy/dx . (partial derivative)df/dr

    =

    dy/dx . x/r


    I'm assuming I use the chain rule..? if so what substitution do i need to make..and how does this work..?
    Clearly there is important background information to this question that you haven't included ....
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