Evaluate the given exponential expression
(Type an integer or a fraction)

[tex]\\ \tt\bull\leadsto 9^{-5}9[/tex]
[tex]\\ \tt\bull\leadsto 9^{-5+1}[/tex]
[tex]\\ \tt\bull\leadsto 9^{-4}[/tex]
[tex]\\ \tt\bull\leadsto \dfrac{1}{2561}[/tex]