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On (\mathbb{Z}), (a*b=a+b-1). Which property does this operation satisfy?

Answer and explanation

Correct answer: Both commutative and associative

Step 1: (a*b=a+b-1=b+a-1=b*a), so it is commutative. Step 2: ((a*b)*c=a+b+c-2) and (a*(b*c)=a+b+c-2), so it is associative. Step 3: In shifted addition, if the constant adjusts equally in both groupings, associativity holds.

Related tags

Binary OperationsCommutativeAssociativeRelations And FunctionsMathematicsClass 12 Mcq

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