So that would be f inverse, or we're saying g is the same thing as f inverse. So all of that so far is a review of inverse functions, but now we're going to apply a little bit of calculus to it using the chain rule. And we're gonna get a pretty interesting result. What I wanna do is take the derivative of both sides of this equation right over here. So let's apply the derivative operator, d dx on the left-hand side, d dx on the right-hand side, and what are we going to get? Well, on the left-hand side, we would apply the chain rule. So this is going to be the derivative of g with respect to f of x, so that's going to be g prime of f of x, g prime of f of x, times the derivative of f of x with respect to x, so times f prime of x, and then that is going to be equal to what?