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Question 18 - Whether binary commutative/associative or not - Chapter 1 Class 12 Relation and Functions

Last updated at May 29, 2023 by

Example 35 - Show a * b = a + 2b is not commutative - CBSE - Examples

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Question 18 Show that ∗ : R × R → R defined by a ∗ b = a + 2b is not commutative. We have to prove it is not commutative i.e. a * b ≠ b * a a + 2b ≠ b +2a Let a = 3, b = 4 Since a * b ≠ b * a * is not commutative.

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.