Let / : A ~ B and g : B ~ C be functions. (a) Show that if go/ is injective, then / is
Chapter 1, Problem 20(choose chapter or problem)
Let / : A ~ B and g : B ~ C be functions. (a) Show that if go/ is injective, then / is injective. (b) Show that if go/ is surjective, then g is surjective. 2
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