
Arturo O. answered 04/18/17
Tutor
5.0
(66)
Experienced Physics Teacher for Physics Tutoring
Please use parentheses. I assume you really meant
y = 1/(x + 3)
The domain is all real numbers except where the denominator is zero, which is at x = -3. In interval notation, the domain is (-∞, -3) ∪ (-3, ∞).