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On (A={1,2,3,4}), (R={(a,b):a+b\geq 2a}) is given. Is (R) reflexive?

Answer and explanation

Correct answer: Yes because (a+a\geq 2a) is true for every (a)

Step 1: For reflexivity, put (b=a). Step 2: The condition becomes (a+a\geq 2a), or (2a\geq 2a), which is always true. Step 3: In inequality relations, carefully test the equality case.

Related tags

RelationsFunctionsReflexive RelationInequalityRelations And FunctionsMathematicsClass 12 Mcq

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