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If (A={1,2,3,4}) and (R={(1,2),(2,1),(1,3),(3,1),(2,4)}), what will be the smallest symmetric extension of (R)?

Answer and explanation

Correct answer: (R\cup{(4,2)})

Step 1: A symmetric extension keeps all given pairs and adds only the missing reverse pairs. Step 2: The reverse of ((2,4)) is ((4,2)), and it is missing, while other unequal pairs already have reverses. Step 3: For the smallest extension, add only the compulsory reverse pairs.

Related tags

Symmetric RelationSymmetric ExtensionOrdered PairsClass 12Relations And FunctionsMathematicsClass 12 Mcq

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