17. Let a be a real number. The maximum value of the function $f ( x ) = \left| x ^ { 2 } - a x \right|$ on the interval $[ 0,1 ]$ is denoted by $g ( a )$. When $a =$ $\_\_\_\_$,
$$\mathbf { y }$$
the value of $g ( a )$ is minimized.\\
III. Solution Questions\\