Let f : A B and g : B C be functions. (a) Show that
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(a) Show that if g ο f is injective, then f is injective.
(b) Show that if g ο f is surjective, then g is surjective.
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Related Book For
Introduction to Real Analysis
ISBN: 978-0471433316
4th edition
Authors: Robert G. Bartle, Donald R. Sherbert
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