Hi all,

I got some problems doing some exams exercises...

They ask me to study the continuity and the differentiability of some functions but I always get similar results... (Doh)

, if !=

, if

The function is continuous when != but it is not when because the limit for results +∞ or -∞ depending on the approaching direction... Am I wrong? If yes, how do I have to solve that limit? Thanks to all!