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discrete math 1 please explain each step and write every...

Question: discrete math 1 please explain each step and write every...

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Discrete Math 1: Please explain each step and write every detail so that I can understand for future problems. This is discrete math on so please do not make it very complicated.

Definition : For a function G : A → B and a subset C-B, the so called inverse image of C is the set of all elements a from the domain A for which 9(a) C That is, Problem 2 (4 pts): Let f : A → B be a function and let the sets A and B be finite with |A- B. Prove that f is one-to-one if and only if it is onto.

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Question: discrete math 1 please explain each step and write every...

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