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On the set (A={1,2,3}), the relation (R={(1,1),(2,2),(3,3),(1,2),(2,1)}) is given. Which pair must be added to make it an equivalence relation?

Answer and explanation

Correct answer: No pair

Step 1: Every element is related to itself, so the relation is reflexive. Step 2: The pair ((1,2)) has its reverse ((2,1)), so symmetry holds. Step 3: The classes are ({1,2}) and ({3}), so no extra pair is needed.

Related tags

Equivalence RelationReflexiveSymmetricTransitiveRelations And FunctionsMathematicsClass 12 Mcq

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