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If (R) is symmetric and transitive and ((a,b)\in R), which pair must definitely belong to (R)?

Answer and explanation

Correct answer: ((a,a)), for the same (a) and (b) in the given pair

Step 1: From ((a,b)\in R), symmetry gives ((b,a)\in R). Step 2: By transitivity, ((a,b)) and ((b,a)) imply ((a,a)\in R). Step 3: This conclusion applies to the involved elements, not automatically to every element of the set.

Related tags

Symmetric And TransitiveRelationsLogical ImplicationClass 12Symmetric RelationRelations And FunctionsMathematicsClass 12 Mcq

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