If f(x)=\acx−1x+1f(x) = \ac{x-1}{x+1}f(x)=\acx−1x+1 (assume xeq−1x eq -1xeq−1), find f(f(x))f(f(x))f(f(x)).
−1/x-1/x−1/x
xxx
1
−x-x−x