Find the derivative of f(x)=x2+1x2−1f(x) = \frac{x^2+1}{x^2-1}f(x)=x2−1x2+1 at x=2x=2x=2.
−8/9-8/9−8/9
8/98/98/9
−4/9-4/9−4/9
4/94/94/9