Question

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Answer 1

$f( \frac{1}{3} ) = 3 \times ( \frac{1}{3} ) - \frac{1}{3}$

$f( \frac{1}{3} ) = \frac{3}{3} - \frac{1}{3}$

$f( \frac{1}{3} ) = \frac{2}{3}$