Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.3: Properties Of Composite Mappings (optional)
Problem 4E: Give an example of mappings and such that one of or is not onto but is onto.
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Show that an onto function f : {1, 2, 3} → {1, 2, 3} is always one-one.
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