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. Well, where everywhere in the derivative we saw an x, we can replace it with a g of x. It's going to be 1 half times, instead of an x to the negative 1 half, we can write a g of x. We can write a g of x to the 1 half.