Answer:
[tex]f(-2) = \frac{1}{81}[/tex]
Step-by-step explanation:
Substitute x with -2.
[tex]f(x)=9^x[/tex]
[tex]f(-2)=9^{-2}[/tex]
Use exponental rule (negative exponent): [tex]a^{-x} = \frac{1}{a^x}[/tex]
[tex]f(-2) = \frac{1}{9^{2}}[/tex]
[tex]f(-2) = \frac{1}{81}[/tex]
