But that's, we've already restricted ourselves to that domain. So within the domain, any point in the domain, our derivative is actually going to be defined. So given that, let's see what's happening on either side of this critical point. On either side of this critical point. And I could draw a little number line here to really help us visualize this. So, if this is negative one, this is zero, this is, let's see, one e to the, this is gonna be like one over, oh boy, this is, this is going to be a little bit less than one. So let's see, let me plot one here, and then two here.