Question: Suppose that A is a nonempty set, and f is a function that has A as its domain. Let R be the relation on A

Suppose that A is a nonempty set, and f is a function that has A as its domain. Let R be the relation on A consisting of all ordered pairs (x, y) such that f (x) = f (y).
a) Show that R is an equivalence relation on A.
b) What are the equivalence classes of R?

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