Find a function f: Q → Q that is both surjective and injective but not the identity function.
Find a function f: Q → Q that is both surjective and injective but not the identity function.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Find a functionf : Q → Q that is both surjective and injective but not the identity
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