Let f : A → B and g : B → C be bijections. Prove that gof is invertible and that (g o f)-1 = f-1 o g¬1.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.5: Permutations And Inverses
Problem 10E: 10. Let and be mappings from to. Prove that if is invertible, then is onto and is...
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Let f : A → B and g : B → C be bijections. Prove that gof is invertible and that
(g o f)-1 = f-1 o g¬1.
Transcribed Image Text:Let f : A → B and g : B → C be bijections. Prove that gof is invertible and that (g o f)-1 = f-1 o g¬1.
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