I know how to prove the quotient rule by using the definition of a derivative using limits (Newton's style). I just saw a proof of the(adsbygoogle = window.adsbygoogle || []).push({}); productrule using Leibniz's concept of differentials on Wikipedia. https://en.wikipedia.org/wiki/Product_rule#Discovery

Does anyone know of a Leibniz-style proof of the quotient rule? I was not able to find it and when I tried doing it myself I got an extra term in the denominator.

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# B Proof of quotient rule using Leibniz differentials

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