Question: how to find inverse function derivative?
Answer: Use the inverse function theorem to find the derivative of g(x)=3√x. The function g(x)=3√x is the inverse of the function f(x)=x3. Since g′(x)=1f′(g(x)), begin by finding f′(x). Thus, f′(x)=3x3. f′(g(x))=3(3√x)2=3x2/3. g′(x)=13x2/3=13x−2/3.