f [tex]( \frac{-4}{3} ) = [tex]3 X (\frac{-4}{3} ) + \frac{1}{5} X ( \frac{-4}{3} ) - 1 [/tex]
f [tex]( \frac{-4}{3} )[/tex] = [tex] \frac{-12}{3} + \frac{-4}{15} - 1 [/tex]
f [tex]( \frac{-4}{3} ) = \frac{-60}{15} + \frac{-4}{15} - \frac{15}{15} [/tex]
f [tex] (\frac{-4}{3} ) = \frac{-64}{15} - \frac{15}{15} [/tex]
f [tex]( \frac{-4}{3} ) = \frac{-79}{15} [/tex]