Inverse Function Example 6 (Comparison Method) October 5, 2017January 4, 2014 by Example 6 (Comparison Method) If $f:x\mapsto \frac{mx-n}{x-2},x\ne 2$ and ${f}^{-1}:x\mapsto \frac{5-2x}{2-x},x\ne 2.$ . Find the value of m and of n,

why the bracket (-1/-1)?