So let's apply the chain rule. What is f prime of g of x going to be equal to, the derivative of f with respect to g? Well, what's f prime of x? f prime of x is equal to, this is the same thing as x to the 1 half power, so we can just apply the power rule. So it's going to be 1 half times x to the, and then we just take 1 away from the exponent, 1 half minus 1 is negative 1 half. And so what is f prime of g of x? f prime of g of x.