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On (A={1,2,3,4}), (R={(a,b):a \equiv b \pmod{2}}). Reflexivity of (R) is based on which fact?

Answer and explanation

Correct answer: For every (a), (a \equiv a \pmod{2})

Step 1: Reflexivity compares a number with itself. Step 2: Any number has the same remainder as itself when divided by (2). Step 3: Treat (a \equiv a \pmod{2}) as the basic test in congruence relations.

Related tags

Congruence ModuloReflexive RelationClass 12MediumRelations And FunctionsMathematicsClass 12 Mcq

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