Determine whether each of these functions from {a,b,c,d} to itself are one-to-one. a) f(a) = b, f(b) = a, f (c) = c, f(d) = d, b) f(a) = b, f(b) = b, f(c) = d, f(d) = c, c) f(a) = d, f(b) = b, f (c) = c, f (d) = d.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.4: Definition Of Function
Problem 54E
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Problem 13 (#2.3.10).Determine whether each of these functions from {a,b,c,d} to itself are one-to-one.
a) f(a) = b, f(b) = a, f (c) = c, f(d) = d,
b) f(a) = b, f(b) = b, f(c) = d, f(d) = c,
c) f(a) = d, f(b) = b, f (c) = c, f (d) = d.
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