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A student says that a relation on (A={1,2,3}) is reflexive because it contains ((1,1)) and ((2,2)). What missing point should the teacher mention?

Answer and explanation

Correct answer: ((3,3)) is also necessary

Step 1: A reflexive relation must contain the self-pair for every element of the set. Step 2: Since (3\in A), ((3,3)) is also necessary. Step 3: In exams, check all elements instead of doing a partial check.

Related tags

RelationsFunctionsCommon-ErrorReflexiveReflexive RelationRelations And FunctionsMathematicsClass 12 Mcq

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