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

Last updated at April 16, 2024 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 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.