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On (A={1,2,3,4,5,6}), (R={(a,b):a\mid b\text{ and }a\ne b}). What is the nature of this relation?

Answer and explanation

Correct answer: Transitive

Step 1: If (a\mid b) and (b\mid c), then (a\mid c). Step 2: Also, in this forward chain of positive divisibility with (a\ne b) and (b\ne c), we still have (a\ne c). Hence ((a,c)) belongs to the relation. Step 3: In divisibility, check both direction and the inequality condition.

Related tags

Proper DivisibilityTransitive RelationClass 12SetsRelations And FunctionsMathematicsClass 12 Mcq

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