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On integers, (aRb) iff (a+2b) is divisible by (3). In which property does this relation fail?

Answer and explanation

Correct answer: none

Step 1: (a+2a=3a) is always divisible by (3), so it is reflexive. Step 2: (a+2b\equiv 0\pmod 3) implies (b+2a\equiv 0\pmod 3). Step 3: This condition is equivalent to (a\equiv b\pmod 3), so transitivity also holds and no property fails.

Related tags

RelationsModular-RelationEquivalenceExpertIntroduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq

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