f: R -> R

f(x) = x for each x ∈ R

i.e. y = x for each x ∈ R

 

Plotting graph

x

0

1

–2

y

0

1

–2

 

Identity Function.jpg

Here,

Domain   = All values of x = R

Range = All values of y

    = All values of x (Since x = y)

   = R

  1. Chapter 2 Class 11 Relations and Functions
  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 7 years. He provides courses for Mathematics and Science from Class 6 to 12. You can learn personally from here https://www.teachoo.com/premium/maths-and-science-classes/.
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