Question: Problem 2. Let A, B he sets, and consider a function f : A > B. 1. Prove that f is injective if and only

Problem 2. Let A, B he sets, and consider a function

Problem 2. Let A, B he sets, and consider a function f : A > B. 1. Prove that f is injective if and only if X : f'WX for all X E A

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