**Find the derivative from left and from the right at x = 1(if they exists). Is the function differentiable at x = 1?**

**f(x) = | x -1 |**

**Answer:**

**Find the derivative from left and from the right at x = 1(if they exists). Is the function differentiable at x = 1?**

**f(x) = | x -1 |**

**Answer:**