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On integers, (a*b=a+b+2ab) is defined. Is this a binary operation on integers?

Answer and explanation

Correct answer: Yes, because the result is always an integer

Step 1: For closure, if (a,b\in \mathbb{Z}), then (a*b\in \mathbb{Z}). Step 2: (a+b+2ab) is formed using sums and products of integers, so it is always an integer. Step 3: To check closure, verify that the result stays in the same set.

Related tags

Binary OperationsClosureIntegersInternal OperationRelations And FunctionsMathematicsClass 12 Mcq

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