If these constraints are met, then the limit as x approaches a of f of x over g of x is going to be equal to f prime of a over g prime of a. So it's very similar to the general case, it's a little bit more constrained. We're assuming that f prime of a exists, we're not just taking the limit now. We're assuming f prime of a and g prime of a actually exist. But notice if we substitute a right over here, we get 0 over 0. But then if the derivatives exist, we can just evaluate the derivatives at a and then we get the limit. So this is very close to the general case of L'Hospital's Rule.