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On 16-11-2009 14:15, Invisible wrote:
> Fredrik Eriksson wrote:
>
>> 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.
>
> ...what I *should* have done of course is
>
> http://www.wolframalpha.com/input/?i=derivative+f(f(x))
>
> *facepalm*
no, because that is a derivative with respect to f not x.
your answer might be
http://www.wolframalpha.com/input/?i=derivative+f%20f%20x%20with%20respect%20to%20x
but then again it might not, depending on what you really want.
Many of my students are (hopefully: were) unable to perform a long
division or even a long multiplication. They weren't though at school
because 'everybody has a calculator at hand anyway'.
Someday in the near future all the rest of mathematics and calculus will
not be though anymore because 'everybody has an internet connection at
hand anyway'. That will be a sad day for our culture.
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