Let x be a set and f x rarr r be a real-valued function


Let X be a set and f : X → R be a real-valued function. Show that the relation givenby x ∼ y if and only if f(x) = f(y) is an equivalence relation on X.Remark: Equivalence classes for this relation are called level sets of f.

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Mathematics: Let x be a set and f x rarr r be a real-valued function
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