Let f : Z→ Z be a mapping defined by т if m is even, f(m) = 2m + 1 if m is odd. (a) Verify that f is one-to-one. (b) Since f is one-to-one, find an inverse g : Z→ Z such that of = id. %3D

Elements Of Modern Algebra
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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 : Z → Z be a mapping defined by
т
if m is even,
f(m) =
2m + 1
if m is odd.
(a) Verify that f is one-to-one.
(b) Since f is one-to-one, find an inverse g : Z→ Z such that g o f = id.
Transcribed Image Text:Let f : Z → Z be a mapping defined by т if m is even, f(m) = 2m + 1 if m is odd. (a) Verify that f is one-to-one. (b) Since f is one-to-one, find an inverse g : Z→ Z such that g o f = id.
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