ID: Class: 11 Subject: Math Topic: Limits and Derivatives Type: Subjective Year: null

Question:

If $f(x)=\begin{cases}|x|+1,&x<0\\ 0,&x=0\\ |x|-1,&x>0\end{cases}$. For what value(s) of $a$ does $\lim_{x\rightarrow a}f(x)$ exist?