Find all points of discontinuity of f, where f is defined by`f(x)={{:(x/(|x|), ifx<0),( 1, ifxgeq0):}`

Explanation

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

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