### Home > APCALC > Chapter 12 > Lesson 12.2.2 > Problem 12-84

12-84.

**Multiple Choice: **Which of the following statements must be true about the function defined at right?

is continuous at.is differentiable at.is differentiable at.

I only

II only

I and III only

II and III only

I and II only

Therefore is continuous at

*.*

Therefore is not differentiable at

*.*