Find the Domain and Range y=4tan(3x)

$y = 4 \tan (3 x)$

Set the argument in $\tan (3 x)$ equal to $\frac{π}{2} + π n$ to find where the expression is undefined.

$3 x = \frac{π}{2} + π n$ , for any integer $n$

Divide each term in $3 x = \frac{π}{2} + π n$ by $3$ and simplify.

Divide each term in $3 x = \frac{π}{2} + π n$ by $3$ .

$\frac{3 x}{3} = \frac{\frac{π}{2}}{3} + \frac{π n}{3}$

Simplify the left side.

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{3 x}{3} = \frac{\frac{π}{2}}{3} + \frac{π n}{3}$

Divide $x$ by $1$ .

$x = \frac{\frac{π}{2}}{3} + \frac{π n}{3}$

Simplify the right side.

Simplify each term.

Multiply the numerator by the reciprocal of the denominator.

$x = \frac{π}{2} \cdot \frac{1}{3} + \frac{π n}{3}$

Multiply $\frac{π}{2} \cdot \frac{1}{3}$ .

Multiply $\frac{π}{2}$ by $\frac{1}{3}$ .

$x = \frac{π}{2 \cdot 3} + \frac{π n}{3}$

Multiply $2$ by $3$ .

$x = \frac{π}{6} + \frac{π n}{3}$

The domain is all values of $x$ that make the expression defined.

Set-Builder Notation:

${x | x \neq \frac{π}{6} + \frac{π n}{3}}$ , for any integer $n$

The range is the set of all valid $y$ values. Use the graph to find the range.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${y | y \in ℝ}$

Determine the domain and range.

Domain: ${x | x \neq \frac{π}{6} + \frac{π n}{3}}$ , for any integer $n$

Range: $(- \infty, \infty), {y | y \in ℝ}$