Find numbers a$=$

and b$=$

such that the following

statement is true:

If f$($x$)=(8$x$+3)/($x$-1),$ then f$^(-1)($x$)=($x$+$a$)/($x$+$b$).$

The range of the function f is $(-\backslash$infty $,$c$)\backslash$cup $($c$,\backslash$infty $),$

where c$=$