Hi. This is not a homework assignment. I am working to get an extrema on a graph that involves a bunch of functions and got stuck on one step:(adsbygoogle = window.adsbygoogle || []).push({});

How to get the derivative of:

[tex]\frac{dy}{dn} = \frac{nc(a+b)}{nc+a}[/tex]

I can't get "n" in a place where I recognize how to get the derivative of it. I get stuck here after the first step..

[tex] nc(a+b)*(nc+a)^{-1}[/tex]

or do I use the quotient rule where it ends up:

[tex] \frac{[nc(a+b)]'*(nc+a) - nc(a+b)(nc+a)'}{(nc+a)^2} [/tex]

[tex] \frac{c(a+b)*(nc+a) - nc(a+b)(c)}{(nc+a)^2} [/tex] ??

Can anyone please help?

Thanks very much in advance

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# Stuck getting derivative when can't isolate my variable

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