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On real numbers, (a*b=a+b+ab) is defined. Choose the correct statement about this operation.

Answer and explanation

Correct answer: Both commutative and associative

Step 1: (a+b+ab=b+a+ba), so the operation is commutative. Step 2: Since (1+(a*b)=(1+a)(1+b)), regrouping three elements behaves like ordinary multiplication. Step 3: For harder associativity checks, a smart transformation saves time.

Related tags

Binary OperationsAssociativeCommutativeRelations And FunctionsMathematicsClass 12 Mcq

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