## What is Signum Function – Graph, Domain and Range

Here you will learn what is signum function definition, graph, domain and range. Let’s begin – What is Signum Function ? Definition : The function f defined by f(x) = $$\begin{cases} | x |\over x, & \text{if}\ |x| \ne 0 \\ 0, & \text{if}\ x = 0 \end{cases}$$ or, f(x) = \(\begin{cases} 1, & \text{if}\ …