# Question #3e6fe

##### 1 Answer

Sep 24, 2016

#### Explanation:

The absolute value function is defined as

Thus, we consider two cases:

**Case 1:**

Then

As this is a tautology, the equation is true for any

**Case 2:**

Then

As we began this case with the restriction

Taken together, we can see that the equation holds true if and only if