Let f : A → B be a function and let E ⊆ A. Prove
Posted: Thu Jun 30, 2022 7:36 pm
Let f : A → B be a function and let E ⊆ A. Prove
(a) If f is injective, then show that f-¹ƒ(E) = E. (b) Give an example of a function f such that f-1f(E) ‡ E.
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