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On (A={1,2,3,4,5,6}), (aRb) if and only if (a+b) is divisible by (2). What are the equivalence classes of this relation?

Answer and explanation

Correct answer: ({1,3,5},{2,4,6})

Step 1: (a+b) is even only when (a) and (b) are both even or both odd. Step 2: In the given set, the odd elements are (1,3,5) and the even elements are (2,4,6). Step 3: Hence the relation forms two classes based on parity.

Related tags

Even SumParityEquivalence ClassesFinite SetEquivalence RelationRelations And FunctionsMathematicsClass 12 Mcq

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