Find all points of discontinuity of f, where`f(x)={{:((sinx)/x , ifx<0),(x+1, ifxgeq0):}`

Explanation

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

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