I'm kind of confused about how to prove one to one and onto with functions and composition functions. I am also a visual learner. Could someone tell me step by step how to prove whether or not a function is one to one and if it is onto? Help is greatly appreciated!
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Have you tried using the search bar at the top of the website? – Dec 11 '14 at 01:25
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And see Composition of injections (proof) for injections. – Dec 11 '14 at 02:38