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If (A={1,2,3,4,5}) and (R={(a,b):a=b\text{ or }a+b\text{ is divisible by }3}), what is (R) with respect to reflexivity?

Answer and explanation

Correct answer: Reflexive

Step 1: On the diagonal, (a=b) is always true. Step 2: In an or condition, the first part already includes every ((a,a)). Step 3: So the second part does not need separate checking for reflexivity.

Related tags

Reflexive RelationOr ConditionDivisibilityRelations And FunctionsMathematicsClass 12 Mcq

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