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If [tex]$f(x)=\left(\frac{1}{9}\right)\left(9^x\right)$[/tex], what is [tex]$f(3)$[/tex]?

A. [tex]$\frac{1}{729}$[/tex]
B. 729
C. [tex]$\frac{1}{81}$[/tex]
D. 81

Answer :

We are given the function

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

To find [tex]$f(3)$[/tex], substitute [tex]$x=3$[/tex] into the function:

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

First, calculate [tex]$9^3$[/tex]:

[tex]$$
9^3 = 9 \times 9 \times 9 = 729.
$$[/tex]

Now, substitute this value back into the expression:

[tex]$$
f(3) = \frac{1}{9} \times 729.
$$[/tex]

Finally, multiply:

[tex]$$
\frac{729}{9} = 81.
$$[/tex]

Thus, the answer is [tex]$\boxed{81}$[/tex].

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