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Question 3 Let f: BC and g: A B. (i) Show that if both and g are surjective, then fog is surjective. (ii) Is
Question 3 Let f: BC and g: A B. (i) Show that if both and g are surjective, then fog is surjective. (ii) Is is true that if fog is surjective, then both and g are surjective? Why?
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Discrete Mathematics and Its Applications
Authors: Kenneth H. Rosen
7th edition
0073383090, 978-0073383095
