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On real numbers, (R={(a,b):a^2+b^2\le k}). Which statement is correct about (R) being reflexive on all of (\mathbb{R})?

Answer and explanation

Correct answer: Not reflexive for any real (k)

Step 1: Reflexivity requires ((a,a)) to satisfy the rule for every real (a). Step 2: This means (2a^2\le k) for every real (a). Step 3: Since (a) can be arbitrarily large, no fixed real (k) can work.

Related tags

Real NumbersParameter BoundNot ReflexiveHardReflexive RelationRelations And FunctionsMathematicsClass 12 Mcq

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