0580 P21 - Jun 2015 - Q23 - 6 marks
15194
\(f(x)=5-3x\).
(a) Find \(f(6)\). [1]
(b) Find \(f(x+2)\). [1]
(c) Find \(ff(x)\) in simplest form. [2]
(d) Find \(f^{-1}(x)\). [2]
