Question: Exercise 3 : For a function f : A B and any equivalence relation E on B , let R be a relation on A

Exercise 3:
For a function f:AB and any equivalence relation E on B, let R be a relation on A that satisfies R={(x,y)inAxA:(f(x),f(y))inE}. Prove that R is an equivalence relation.
Exercise 3: For a function f:AB and any equivalence relation E

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