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On the set (A={1,2,3,4,5}), the relation (R={(a,b):a+b\text{ is even}}) is given. Is (R) symmetric?

Answer and explanation

Correct answer: Yes, because (a+b=b+a)

Step 1: A relation is symmetric if ((a,b)\in R) implies ((b,a)\in R). Step 2: Here the condition is (a+b\text{ is even}), and (a+b=b+a), so the reverse pair also satisfies it. Step 3: In exams, check commutative conditions like addition first.

Related tags

Symmetric RelationRelations And FunctionsClass 12 MathMathematicsClass 12 Mcq

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