Respuesta :

Answer: Choice (3): [tex]\frac{1}{27}[/tex]

[tex]x^{-3}=\frac{1}{x^3}\\x=3\rightarrow x^3 = 3^3 = 27\rightarrow \frac{1}{x^3}=\frac{1}{27}[/tex]

Remember that negative power is the same as reciprocal if the same magnitude power but positive.