The inverse of f(x) = \frac{2x-1}{x+5} may be written in the form f^{-1}(x)=\frac{ax+b}{cx+d}, where a,b,c, and d are real numbers. Find a/c.
Post it in latex, I am only going to answer if it is in latex.
If you dunno how to do latex, then remove those extra latex wrappings