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On (A={1,2,3}), (R={(1,2),(2,1),(2,3)}). Why is (R) not symmetric?

Answer and explanation

Correct answer: ((3,2)) is missing

Step 1: ((1,2)) and ((2,1)) are reverse pairs, so they satisfy symmetry. Step 2: The reverse of ((2,3)), which is ((3,2)), is missing. Step 3: For symmetry, ((a,a)) pairs are not required unless reflexivity is asked.

Related tags

Symmetric RelationMissing ReverseClass 12RelationsRelations And FunctionsMathematicsClass 12 Mcq

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