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April 19, 2015

April 19, 2015

Posted by **W** on Thursday, February 9, 2012 at 10:06pm.

I feel that I'm doing this wrong because finding the derivatives of f(x) look really messy. Can you please show me the steps?

Thanks in advance!

- Calculus -
**Steve**, Friday, February 10, 2012 at 6:01pmThe derivatives are messy.

f = 2x/(1+x^2)

f' = -2(x^2 - 1)/(1+x^2)^2

f'' = 4x(x^2 - 3)/(1+x^2)^3

f''' = -12(x^4 - 6x^2 + 1)/(1+x^2)^4

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