Respuesta :

subsitute -4 for x
remember that [tex]x^{-m}=\frac{1}{x^m}[/tex]

so
for x=-4
[tex]f(-4)=9(3)^{-4}[/tex]
[tex]f(-4)=9(\frac{1}{3^4})[/tex]
[tex]f(-4)=9(\frac{1}{81})[/tex]
[tex]f(-4)=\frac{9}{81}[/tex]
[tex]f(-4)=\frac{1}{9}[/tex]
answer is A
wdeangiela

Answer:

1/9

Step-by-step explanation:

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