Find all points of discontinuity of f, where f is defined by`f(x)={{:((|x|)/x , ifx!=0),( 0, ifx=0):}`

Explanation

To find all points of discontinuity of the function \( f \) defined as:

\[
f(x) =
\begin{cases}
\frac{|x|}{x} & \text{if } x \neq 0 \\
0 & \text{if } x = 0
\end{cases}
...