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On (A={1,2,3,4,5}), (R={(a,b):a+b\text{ is odd}}). What is the nature of this relation?

Answer and explanation

Correct answer: Not transitive

Step 1: ((1,2)) is in the relation because (1+2=3) is odd. ((2,3)) is also in the relation because (2+3=5) is odd. Step 2: Transitivity requires ((1,3)), but (1+3=4) is even. Step 3: One valid counterexample disproves transitivity.

Related tags

Odd SumNon TransitiveCounterexampleClass 12Transitive RelationRelations And FunctionsMathematicsClass 12 Mcq

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