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If R = {(1, 2), (2, 4), (1, 4)}, which pair is required in the transitive check?

Answer and explanation

Correct answer: (1, 4)

The governing concept is transitivity. A relation is transitive if (a,b) and (b,c) in R require (a,c) to be in R as well. Here the first two given pairs form a chain: (1,2) and (2,4). Matching the second component of the first pair with the first component of the second gives a required conclusion of (1,4). That pair is present in R, so the displayed chain passes the transitive check. Therefore option B is correct. Pair (4,1) would concern a reverse direction not supplied by the chain; (2,1) is not the required outer pair; and (4,4) does not follow from the two given pairs. The calculation is about connecting the first element to the final element.

Related tags

RelationsTransitive-RelationChain-RuleTransitive RelationRelations And FunctionsMathematicsClass 12 Mcq

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