Determine whether or not each of the definition of given below gives a – InterviewSolution

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1.

Determine whether or not each of the definition of given below gives a binary operation. In the event that is not a binary operation, give justification for this.On Z+ , * define by a * b = a – b

Answer»

2 ∈ Z⁺ , 5 ∈ Z⁺ , 2 – 5 = -3 ∉ Z⁺

hence not a binary operation.

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