3. Let R be the relation defined on P({1,..., 100}) by ARB if and only if |AU B| is even. Is R reflexive? Is R symmetric? Is R anti-symmetric? Is R transitive? Justify your answers.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.2: Mappings
Problem 18E: 18. Let and be defined as follows. In each case, compute for arbitrary . a. b. c. d. e.
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please send handwritten solution for Q 3
1. Consider the function f : Z × Z → Z × Z defined by
f(a, b) = (a+ b, a - b).
%3D
Is f injective? Is f surjective? Justify your answers.
2. Let f be the function from Question 1. Find a function g : Z × Z → Z × Z such that g(f(a, b)) = (a, b)
for all a, b.
[You don't need to prove anything – just write down clearly what g is.]
3. Let R be the relation defined on P({1,.., 100}) by
.....
ARB
if and only if |A U B| is even.
Is R reflexive? Is R symmetric? Is R anti-symmetric? Is R transitive? Justify your answers.
Transcribed Image Text:1. Consider the function f : Z × Z → Z × Z defined by f(a, b) = (a+ b, a - b). %3D Is f injective? Is f surjective? Justify your answers. 2. Let f be the function from Question 1. Find a function g : Z × Z → Z × Z such that g(f(a, b)) = (a, b) for all a, b. [You don't need to prove anything – just write down clearly what g is.] 3. Let R be the relation defined on P({1,.., 100}) by ..... ARB if and only if |A U B| is even. Is R reflexive? Is R symmetric? Is R anti-symmetric? Is R transitive? Justify your answers.
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