Let f of x be equal to negative one over x minus one squared. Select the correct description of the one-sided limits of f at x equals one. And so we can see we have a bunch of choices where we're approaching x from the right-hand side and we're approaching x from the left-hand side. And we're trying to figure out do we get unbounded on either of those in the positive, towards positive infinity or negative infinity. And there's a couple of ways to tackle it. The most straightforward, let's just consider each of these separately. So we could think about the limit of f of x as x approaches one from the positive direction and limit of f of x as x approaches one from the left-hand side.