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On (A={1,2,3,4}), (a*b=\max(a,b)). What is the identity element?

Answer and explanation

Correct answer: (1)

Step 1: We need (\max(a,e)=a) for every (a\in A). Step 2: This is possible when (e) is the smallest element, which is (1). Step 3: For a (\max) operation, the identity is the smallest element.

Related tags

Binary OperationMax OperationIdentityFinite SetBinary OperationsRelations And FunctionsMathematicsClass 12 Mcq

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