For which of the following values of $x$ is the rational expression undefined?
$\frac{5}{x}$

• A. $0$
• B. $5$
• C. $1$
• D. 2

Answer: (A)

Verified step by step guidance

1. Identify the rational expression given: \(\frac{5}{x}\).
2. Recall that a rational expression is undefined when its denominator is equal to zero because division by zero is undefined.
3. Set the denominator equal to zero: \(x = 0\).
4. Solve the equation \(x = 0\) to find the value(s) of \(x\) that make the expression undefined.
5. Conclude that the rational expression \(\frac{5}{x}\) is undefined when \(x = 0\).