# How do you find the domain of #f(x) = |2x + 1|#?

##### 1 Answer

Feb 27, 2017

#### Answer:

#### Explanation:

The domain is the set of

The range is the set of

For

However, because it is the ultimate value (or modulus) function, it is the positive distance from zero - in other words, if the output is negative, it becomes positive, and if it is positive, is stays positive.

Therefore, it can only be positive, so the range is: