Section A ( 39 marks )
1 . Let f x � x � x � .
2
( ) 2 20 60
( a ) Find the equation of the axis of symmetry of the graph of f .
The function can be also expressed in the form
2 f ( x) a( x h) k � � � .
[ 2 ]
( b ) ( i ) Write down the value of a .
( ii ) Write down the value of h .
( iii ) Find the value of k . [ 5 ]
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