Well, we just use the product rule. It's the derivative of the first function right over here. So it's going to be f prime of x times just the second function, which is just g of x to the negative 1 power, plus the first function, which is just f of x, times the derivative of the second function. And here we're going to have to use a little bit of the chain rule. The derivative of the outside, which we could kind of use something to the negative 1 power with respect to that something, is going to be negative 1 times that something, which in this case is g of x, to the negative 2 power. And then we have to take the derivative of the inside function with respect to x, which is just g prime of x. And there you have it.