whats the domain?

Question

Answer 1

The domain of a function is the list of valid inputs that will create a valid output.

In this case, the denominator cannot be zero so x cannot be -4, 0, or 4.

The domain then is all real numbers except for these three points.

In interval notation, you would write that as:

(-∞, -4) U (-4, 0) U (0, 4), U (4, ∞)