# What is the domain and range of y= (x+1)/(x^2-1)?

Mar 26, 2018

$f : \mathbb{R} - \left\{1\right\} \rightarrow \mathbb{R}$

#### Explanation:

$y = \frac{x + 1}{{x}^{2} - 1} = \frac{x + 1}{\left(x + 1\right) \left(x - 1\right)} = \frac{1}{x - 1}$
$x - 1 = 0$
$x = 1$