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On (A={1,2,3,4}), (R={(a,b): |a-b|) is even(}). How many equivalence classes are formed?

Answer and explanation

Correct answer: (2)

Step 1: (|a-b|) being even means (a) and (b) have the same parity. Step 2: Thus one class is ({1,3}) and the other is ({2,4}). Step 3: In such questions, identify the hidden grouping first.

Related tags

RelationsEquivalence-ClassesParityClass12Introduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq

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