Suppose f is a one-to-one, differentiable function and its inverse function f^-1 is also differentiable. One can show, using implicit differentiation (do it!), that
(f^-1)'(x) = 1 / f'(f^-1(x))
Find (f^-1)'(-3) if f(1) = -3 and f'(1) = 3/7.
(f^-1)'(-3) =