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On real numbers, (aRb) if and only if (a-b) is rational. Choose the correct statement about the equivalence classes of this relation.

Answer and explanation

Correct answer: Each class contains numbers having rational difference from a chosen number

Step 1: (a-a=0) is rational, so the relation is reflexive. Step 2: Changing the sign of a rational difference keeps it rational. Step 3: The class of a chosen number (a) is ({x\in R:x-a\in Q}); this is the key exam idea.

Related tags

Real NumbersRational DifferenceEquivalence ClassConceptualEquivalence RelationRelations And FunctionsMathematicsClass 12 Mcq

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