Hi there and this problem, whereas to find the derivative of F of X equals. We're told before all these problems, by the way, that a be and C and K artist Constance So X is the only variable here. Notice we definitely have a quotient. So we're going to use the quotient rule. We'll call our top function f Actually, since we're already using F, we'll call our top function H Let's say caller bottom function G kind of like the book does. And so the quotient rule says that the derivative will be the bottom function times that river to the top, minus top times the derivative of the bottom all over the bottom squared. So all we have to do now is plugging our own top and bottom for H and G SOCOG. The bottom in our case is C X plus came many times the derivative of the top. The top is a X plus B minus. Now we need the top, which is a X plus be times the derivative of the bottom. The bottom is C express cape and then on the bottom you just get G squared. So time to take the derivatives on top. The bottom is not gonna change. So I'm just gonna put that in there right now. Okay, so on top this first parentheses, this is going to stay there. So next we're going to need this derivative here and the derivative of X plus B. No, I am. Beard is Constance. So the derivative of eight Times X is just a and the derivative of this plus B zero. Cosby's just a constant. So are derivative is actually just a That wasn't too bad. Now we have minus this. Parentheses stays as it is, and we just need now the derivative of CX plus que But this is exactly the same cases before the derivative of C C Times X plus Que Let's just see okay, So time just to simplify the top a little bit weaken Distribute. So we get Let's see, a time see Times X plus eight times k. All that just came from distributing this, eh? Minus gonna be a little careful here. We're going to distribute the minus azi, distribute the sea so we'll get minus. Get a time, see times X and minus B times c. Make sure you're convinced about that we distribute the Sian and then me to distribute the minus across Take it. And on bottom we just have everything the same as it was looking at the top, we noticed that we have a plus a c x and a minus a C X. So these actually cancel out And so all we're left with at the end you get eight times k minus b times c all over, see X plus que scored and that is our derivative hopefully.