So if we want to take its derivative, you might say, well maybe the quotient rule is important here. And I'll always give you my aside. The quotient rule, I'm gonna state it right now, and it could be useful to know it, but in case you ever forget it, you can derive it pretty quickly from the product rule, and if you know it, the chain rule combined, you can get the quotient rule pretty quick. But let me just state the quotient rule right now. So if you have some function defined as some function in a numerator divided by some function in the denominator, we can say its derivative, and this is really just a restatement of the quotient rule, its derivative is going to be the derivative of the function in the numerator, so d dx f of x times the function in the denominator, so times g of x minus, minus the function in the numerator, minus f of x, not taking its derivative, times the derivative of the function in the denominator, d dx g of x, all of that over, so all of this is going to be over the function in the denominator squared. So this g of x squared, g of x, g of x squared. And you could use different types of notation here, you could say, instead of writing this with the derivative operator, you could say this is the same thing as g prime of x, and likewise, you could say, well, that is the same thing as f prime of x.