# Ex 1.4, 9 (iii) - Chapter 1 Class 12 Relation and Functions (Term 1)

Last updated at Aug. 11, 2021 by Teachoo

Last updated at Aug. 11, 2021 by Teachoo

Transcript

Ex 1.4, 9 Let * be a binary operation on the set Q of rational numbers as follows. Find which are associative and which are commutative : (iii) a * b = a + ab Check commutative * is commutative if a * b = b * a Since a * b ≠ b * a * is not commutative a * b = a + ab Check associative * is associative if (a * b) * c = a * (b * c) Since (a * b) * c ≠ a * (b * c) * is not an associative binary operation

Ex 1.4

Ex 1.4 ,1 (i)
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Ex 1.4 ,1 (ii) Important Deleted for CBSE Board 2022 Exams

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Ex 1.4, 9 (i) Deleted for CBSE Board 2022 Exams

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Ex 1.4, 9 (iv) Important Deleted for CBSE Board 2022 Exams

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Chapter 1 Class 12 Relation and Functions (Term 1)

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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.