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On (A=\mathbb{R}\setminus{0}), (a*b=ab). Which statement is correct for this operation?

Answer and explanation

Correct answer: It satisfies all basic group-like conditions

Step 1: The product of two non-zero real numbers is non-zero, so closure holds. Step 2: (1) is identity and every (a\neq0) has inverse (\frac{1}{a}). Step 3: Even familiar multiplication should be checked against the given set.

Related tags

Binary OperationMultiplicationIdentityInverseBinary OperationsRelations And FunctionsMathematicsClass 12 Mcq

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