Question

How do you find the domain of `|2x + 1|`?

Answer 1

The domain is all real numbers, or `RR`.

Explanation:

The domain of a real function, or expression, is a set that contains every possible value the independent variable (`x`, in our case) can take, so that the evaluation is possible and makes sense.

`abs(2x-1)` makes sense for any real value of `x`, therefore its domain is all real numbers.