Well, it's going to be the derivative of the square root of something with respect to that something. Well, the derivative of the square root of something with respect to that something or the derivative of something to the 1 half with respect to that something It's going to be 1 half times that something to the negative 1 half power. Once again, this right over here is the derivative of the square root of y with respect to y. We've seen this multiple times. If I were to say the derivative of the square root of x with respect to x, you would get 1 half x to the negative 1 half. Now I'm just doing it with y's. But we're not done yet.