### Home > CALC > Chapter 11 > Lesson 11.1.2 > Problem 11-24

11-24.

**Multiple Choice:**The functionin non-differentiable at: Homework Help ✎ −1

0

1

−1, 1

−1, 0, 1

To solve this algebraically, rewrite the function as a piecewise-defined function with three pieces.

Then take the derivative of each piece.

Decide whether or not the derivatives agree at the "breaking points".

Otherwise, look at the graph.