If f(x)=2x−1f(x) = \frac{2}{x-1}f(x)=x−12, find f(f(x))f(f(x))f(f(x)).
x−1x\frac{x-1}{x}xx−1
x−1x-1x−1
xxx
2(x−1)3−x\frac{2(x-1)}{3-x}3−x2(x−1)