Questions: Find the domain of the following rational function
F(x) = 9 x(x-4) / (6 x^2 - 41 x - 7)
Select the correct choice below and, if necessary, fill in any answer boxes within your choice.
A. The domain of F(x) is (s ?
(Type in inequality in the form a<x<b. Use integers or fractions for any numbers in the expression. Use a comma to separate entries as needed.)
B. The domain of F(x) is the set of all real numbers.
Transcript text: Find the domain of the following rational function
\[
F(x)=\frac{9 x(x-4)}{6 x^{2}-41 x-7}
\]
Select the correct choice below and, if necessary, fill in any answer boxes within your choice.
$\square$
A. The domain of $F(x)$ is $(\mathrm{s} \mid \square$ ?
(Type in inequality in the form $a
Solution
Solution Steps
To find the domain of the function \( F(x) = \frac{9x(x-4)}{6x^2 - 41x - 7} \), we need to determine the values of \( x \) for which the denominator is not zero, as division by zero is undefined. This involves solving the quadratic equation \( 6x^2 - 41x - 7 = 0 \) to find the values of \( x \) that make the denominator zero. The domain will be all real numbers except these values.
Step 1: Identify the Denominator
To find the domain of the function \( F(x) = \frac{9x(x-4)}{6x^2 - 41x - 7} \), we need to determine the values of \( x \) for which the denominator is zero. The denominator is given by:
\[
6x^2 - 41x - 7
\]
Step 2: Solve the Quadratic Equation
We solve the quadratic equation \( 6x^2 - 41x - 7 = 0 \) to find the values of \( x \) that make the denominator zero. The solutions to this equation are:
\[
x = -\frac{1}{6} \quad \text{and} \quad x = 7
\]
Step 3: Determine the Domain
The domain of \( F(x) \) is all real numbers except the values that make the denominator zero. Therefore, the domain is:
\[
x \in \mathbb{R} \setminus \left\{ -\frac{1}{6}, 7 \right\}
\]
Final Answer
The domain of \( F(x) \) is:
\[
\boxed{x \in \mathbb{R} \setminus \left\{ -\frac{1}{6}, 7 \right\}}
\]
For the multiple-choice question, the correct answer is:
\[
\boxed{\text{A}}
\]