If g(x) is the inverse function f(x) and \(\rm f'(x)=\dfrac{1}{1+x^4}\) then g'(x) is

1
1 + [g(x)]4
2
1 - [g(x)]4
3
1 + [f(x)]4
4
\(\rm \dfrac{1}{1+[g(x)]^4}\)

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