$f(x)=\frac{x-1}{x^{2}-1}$
Final Answer: \(\boxed{f(x) = \frac{1}{x + 1}}\)
Step 1 :Given function: \(f(x)=\frac{x-1}{x^{2}-1}\)
Step 2 :Factor the denominator as a difference of squares: \(x^{2}-1 = (x-1)(x+1)\)
Step 3 :Simplify the function by canceling out the common factors in the numerator and denominator: \(f(x)=\frac{x-1}{(x-1)(x+1)}\)
Step 4 :Final Answer: \(\boxed{f(x) = \frac{1}{x + 1}}\)