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Let R be the relation on Z defined by R = {(a, b): a, b ∈ Z, a – b is an integer}. 

Find the domain and range of R. 

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by (2.5k points)
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R = {(a, b): a, b ∈ Z, a – b is an integer} It is known that the difference between any two integers is always an integer. 

∴ Domain of R = Z Range of R = Z 

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