Answer :

We are given the function

$$
f(x) = \frac{1}{9} \cdot 3^x.
$$

To find $f(5)$, substitute $x = 5$ into the function:

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

Now, calculate $3^5$:

$$
3^5 = 3 \times 3 \times 3 \times 3 \times 3 = 243.
$$

Then,

$$
f(5) = \frac{1}{9} \times 243.
$$

Dividing $243$ by $9$ gives:

$$
\frac{243}{9} = 27.
$$

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

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Rewritten by : Barada