Answer :

To find [tex]$f(5)$[/tex] for the function
[tex]$$
f(x)=\frac{1}{9}\cdot 3^x,
$$[/tex]
we substitute [tex]$x=5$[/tex] into the function:

[tex]$$
f(5) = \frac{1}{9}\cdot 3^5.
$$[/tex]

Next, we calculate [tex]$3^5$[/tex]. Since

[tex]$$
3^5 = 3 \times 3 \times 3 \times 3 \times 3 = 243,
$$[/tex]

the expression becomes:

[tex]$$
f(5) = \frac{1}{9}\cdot 243.
$$[/tex]

Finally, we compute the multiplication:

[tex]$$
\frac{1}{9} \cdot 243 = \frac{243}{9} = 27.
$$[/tex]

Thus, the value of [tex]$f(5)$[/tex] is [tex]$\boxed{27}$[/tex].

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