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If (R={(a,b):a,b\in\mathbb{Z}\text{ and }a+b\text{ is odd}}), what type of relation is (R)?

Answer and explanation

Correct answer: Not transitive

Step 1: If (a+b) is odd, (a) and (b) have opposite parity. Step 2: If (b+c) is also odd, then (a) and (c) have the same parity, so (a+c) is even. Step 3: Two consecutive odd-sum conditions do not give the third odd-sum condition.

Related tags

Odd SumNon TransitiveCounterexampleTransitive RelationRelations And FunctionsMathematicsClass 12 Mcq

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