Respuesta :

Answer:

[tex]\frac{5}{81}[/tex]

Step-by-step explanation:

To evaluate f(4) substitute x = 4 into f(x)

f(4) = 5 × [tex](\frac{1}{3 )} ^{4}[/tex] = 5 × [tex]\frac{1}{3^{4} }[/tex] = [tex]\frac{5}{81}[/tex]