page 07 MARKS 11. Express 2 2 12 23 x x   in the form   2 p x q r  . 12. Given that  π sin 4 3 3 f x x         , evaluate π 6 f       . 13. (a) (i) Show that   2 x  is a factor of  3 2 24 f x x x x     2 20 . (ii) Hence, or otherwise, solve  f x 0. The diagram shows the graph of  y f x  . y x O  y f x  (b) The graph of  , 0 y f x k k    has a stationary point at (1, 0). State the value of k. [Turn over 3 3 2 3 1