Question

what is signum function??

Answer 1

$\textbf{Answer is in Attachment !}$

Answer 2

SOLUTION

f: R------R

This is known as signum function.

Let us check value of f(x) for different values of x

for

x= -1

x<0

so, f(x)= -1

For x= -2

x<0

so, f(x) = -1

For x= 1

x>0

so, f(x)= 1

For x= 2

x>0

so, f(x)= 1

For x= 0

x= 0

so, f(x)= 0