which of the following functions are continuous at x equals three? Well, as we said in the previous video, in the previous example, in order to be continuous at a point, you at least have to be defined at that point. We saw our definition of continuity. F is continuous at a if and only if the limit of f as x approaches a is equal to f of a. So over here in this case, we could say that a function is continuous at x equals three so f is continuous at x equals three if and only if, if and only if, the limit as x approaches three of f of x is equal to f of three. Now let's look at this first function right over here, natural log of x minus three. Well, try to evaluate, and it's not f now, it's g, try to evaluate g of three.