If f(x)=x3f(x) = x^3f(x)=x3, which of the following is the inverse f−1(x)f^{-1}(x)f−1(x)?
f^{-1}(x) = \sqrt{x}
f^{-1}(x) = \sqrt[3]{x}
f^{-1}(x) = x^{1/2}
f^{-1}(x) = 1/x^3