Resposta :

carloswms2012
[tex]f(x)=-3x+4\\f(\frac{1}{3})=-3*\frac{1}{3}+4\\f(\frac{1}{3})=\frac{-3}{3}+4\\f(\frac{1}{3})=-1+4\\\\f(\frac{1}{3})=3[/tex]

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