One One and Onto functions (Bijective functions)

Last updated at August 13, 2026 by

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

One One and Onto functions (Bijective functions) - Part 2

Function is one one and onto.

∴ It is bijective

One One and Onto functions (Bijective functions) - Part 3

Function is not one one and not onto.

∴ It is not bijective

One One and Onto functions (Bijective functions) - Part 4

Function is one one but not onto.

∴ It is not bijective

 

Remove Ads Take short quiz All Quiz and Worksheets
Teachoo · Class 12 Explore Class 12
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.