1. Let X be a set and f: X X be a function. Suppose that fofof is an injection. Prove that f must be an injection.
1. Let X be a set and f: X X be a function. Suppose that fofof is an injection. Prove that f must be an injection.
Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter8: Functions
Section8.1: Concept Of A Function
Problem 100PS
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