Let f : R → R given by f (x) = |x|. Show that f is a function. Is f injective? Is f surjective?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.5: Graphs Of Functions
Problem 59E
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Let f : R → R given by f (x) = |x|. Show that ƒ is a function. Is f injective? Is f surjective?
Transcribed Image Text:Let f : R → R given by f (x) = |x|. Show that ƒ is a function. Is f injective? Is f surjective?
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