Find the Domain (x+1)/(x-7)

$\frac{x + 1}{x - 7}$

Step 1

Set the denominator in $\frac{x + 1}{x - 7}$ equal to $0$ to find where the expression is undefined.

$x - 7 = 0$

Step 2

Add $7$ to both sides of the equation.

$x = 7$

Step 3

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

Interval Notation:

$(- \infty, 7) \cup (7, \infty)$

Set-Builder Notation:

${x | x \neq 7}$

Step 4