# Example 21 - Chapter 1 Class 12 Relation and Functions (Term 1)

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Example 21 Are f and g both necessarily onto, if gof is onto? Let f : {1, 2, 3, 4} {1, 2, 3, 4} f is not onto g: {1, 2, 3, 4} {1, 2, 3} g is onto gof is onto. But g & f are not necessarily onto

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Chapter 1 Class 12 Relation and Functions (Term 1)

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About the Author

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.