differenciation

From: Edo (eddod_at_eddododod.dod)
Date: 11/10/04 

Date: Wed, 10 Nov 2004 06:44:27 -0800

Hello

thought about this for long enough, can't figur out what facts were used
if
            x^3
f(x) = --------------
        x^4 + 10000

then

         -x^2 (x^4-30000)
f'(x) = ------------------
          (x^4 + 10000)^2

thanks

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