Question

determine the excluded value(s) of the rational expression: $f(x)=\frac{x + 1}{x - 7}$ if there are multiple answers, separate them with a comma.

Explanation:

Step1: Recall the rule for excluded values

In a rational expression $\frac{a}{b}$, $b
eq0$. Here, $b = x - 7$.

Step2: Set the denominator equal to zero

Set $x - 7=0$.

Step3: Solve for x

Adding 7 to both sides of the equation $x - 7=0$, we get $x=7$.

Answer:

7