Section A ( 57 marks )
1 . Let f x � x � x � .
2
( ) 3 18 100
( a ) ( i ) Write down the coordinates of the vertex .
( ii ) Hence or otherwise , express the function in the form
2 f ( x) 3 ( x h) k � � � .
( b ) Solve the equation f( x) �� 52.
[ 4 ]
[ 3 ]
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