"Fredrik Eriksson" <fe79}--at--{yahoo}--dot--{com> wrote:
> On Mon, 16 Nov 2009 13:39:50 +0100, Invisible <voi### [at] devnull> wrote:
> > Suppose that the first derivative of f(x) is g(x).
> >
> > What the hell is the derivative of f(f(x))?
>
> http://www.google.com/search?q=What+is+the+derivative+of+a+composite+function%3F
>
> http://en.wikipedia.org/wiki/Chain_rule
>
> Basic high-school level math. I am slightly surprised that you did not
> know it, though I am not in the least surprised that you did not bother to
> google for it.
>



Already knowing the answer could mean already being familiar with the terms
"composite function" and "chain rule".  It wasn't necessarily a stupid question.

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