One-one is also known as injective.

Onto is also known as surjective.

 

Both  one-one and onto are known as bijective .

 


Check whether the following are bijective.

Example 1 - Checking one one and onto.jpg

Function is one one and onto.

∴ It is bijective


Example 2 - Checking one one and onto.jpg

Function is one one and onto.

∴ It is bijective


Example 3 - Checking one one and onto.jpg

Function is not one one and not onto.

∴ It is not bijective


Example 4 - Checking one one and onto.jpg

Function is one one but not onto.

∴ It is not bijective

 

  1. Chapter 1 Class 12 Relation 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 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.