Which of the following define equivalence relations on the set Z-{0}? A/ a ~ b if and only if a2=b4. B/ ab if and only if both a,b are divisible by 3. C/ ab if and only if a,b have the same parity.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.4: Definition Of Function
Problem 55E
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Which of the following define equivalence
relations on the set Z-{0}?
A/ a ~ b if and only if a2=b4.
B/ ab if and only if both a,b are divisible
by 3.
C/ ab if and only if a,b have the same
parity.
D/ ab if and only if |a-5|=|b−5|.
E/ a~ b if and only if y(a)=([b]), where
is the Euler-up function.
F/ ab if and only if |a|, |b| are coprime.
Transcribed Image Text:Which of the following define equivalence relations on the set Z-{0}? A/ a ~ b if and only if a2=b4. B/ ab if and only if both a,b are divisible by 3. C/ ab if and only if a,b have the same parity. D/ ab if and only if |a-5|=|b−5|. E/ a~ b if and only if y(a)=([b]), where is the Euler-up function. F/ ab if and only if |a|, |b| are coprime.
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