f: R R

signum Function.jpg

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

 


Now,

Plotting graph

Signum Function - Part 2

Here,

Domain = All values of x = R

 

Range = All values of y

Since y will have value 0, 1 or –1

Range = {0, 1, –1}

  1. Chapter 2 Class 11 Relations and Functions (Term 1)
  2. Concept wise

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.