So let's first find the slope of the tangent line, and that's where the derivative is useful. So f, well, actually, let me just write f of x again. So I'm gonna write it as x minus one to the negative one power, because that makes it a little bit clearer that we can use the power rule and a little bit of the chain rule. So the derivative of f with respect to x is equal to, so the derivative of x minus one to the negative one with respect to x minus one, well, that's just going to be, we're just going to use the power rule here. It's gonna be negative one times x minus one to the negative two. And then we're gonna multiply that times the derivative of x minus one with respect to x. Well, that's just going to be one, right?