Consider the function $$ f(x)=\frac{3 x+9}{5 x+3} $$. For this function there are two important intervals: $$ (-\infty, A) $$ and $$ (A, \infty) $$ where the function is not defined at $$ A $$. Find $$ A $$

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$$
f(x)=\frac{3x+9}{5x+3}
$$

To find the value $$ A $$ where the function is not defined, we set the denominator equal to zero:

$$
5x + 3 = 0
$$

Solve for $$ x $$:

$$
5x = -3 \quad \Longrightarrow \quad x = -\frac{3}{5}
$$

Thus, the function $$ f(x) $$ is not defined at $$ A = -\frac{3}{5} $$.
$$ A = -\frac{3}{5} $$

Consider the function . For this
function there are two important intervals:
and where the function is not defined at .
Find

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Consider the function . For this function there are two important intervals: and where the function is not defined at . Find