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On (A={1,2,3,4}), (R={(a,b):a+b\le 8}). Is (R) reflexive?

Answer and explanation

Correct answer: Yes, because the maximum (a+a) is 8

Step 1: For self-pairs, check (a+a). Step 2: The largest element in (A) is 4, so the maximum self-sum is (4+4=8), which satisfies the rule. Step 3: In finite sets, checking the largest self-sum is useful.

Related tags

Inequality RelationSum BoundReflexive RelationClass 12Relations And FunctionsMathematicsClass 12 Mcq

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