3.
$$f ( x ) = 3 - \frac { x - 2 } { x + 1 } + \frac { 5 x + 26 } { 2 x ^ { 2 } - 3 x - 5 } \quad x > 4$$
- Show that
$$\mathrm { f } ( x ) = \frac { a x + b } { c x + d } \quad x > 4$$
where \(a , b , c\) and \(d\) are integers to be found.
- Hence find \(\mathrm { f } ^ { - 1 } ( x )\)
- Find the domain of \(\mathrm { f } ^ { - 1 }\)