Question: Let R be a relation on the set A={1,2,3,4,5,6,7} defined by R={(a,b): 4 divides a-b}. Finds element of R^-1

Let R be a relation on the set A={1,2,3,4,5,6,7} defined by R={(a,b): 4 divides a-b}.

Finds element of R^-1

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