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On (A={1,2,3,4,5,6}), (R={(a,b):\gcd(a,b)=1}). Which property does this relation satisfy?

Answer and explanation

Correct answer: symmetric but not reflexive

Step 1: (\gcd(a,b)=\gcd(b,a)), so the relation is symmetric. Step 2: (\gcd(2,2)=2), so not all diagonal pairs are present and it is not reflexive. Step 3: (2R3) and (3R4) hold, but (2R4) fails, so it is not transitive.

Related tags

RelationsGcdSymmetricExpertIntroduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq

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