lestatdark on 26 December 2008
twesterm said:
f(x) = arctan(x2+x) f'(x) = 1 / ((x2+x)2 + 1) = 1 / (x2(x+1)2)
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Well done Twesterm, but the final result is 1/(x2(x+1)2+1), you forgot the 1 ;)
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