(1) Let G = R \ {1}. the set of all real numbers except 1. Show that G, together with the operation * given by x * y = x + y = xy for all x, y Є G, is a group. [5: 1 for each of the four axioms, and 1 for the conclusion] Hint: See Question 3.2 in the Course Notes for an example of how to write this down formally. See also Exercise 7 in Section 4.7 of [Groups, C. R. Jordan and D. A. Jordan], available online via the Library

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.4: Binary Operations
Problem 9E: 9. The definition of an even integer was stated in Section 1.2. Prove or disprove that the set of...
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(1) Let G = R \ {1}. the set of all real numbers except 1. Show that
G, together with the operation * given by x * y = x + y = xy for all
x, y Є G, is a group. [5:
1 for each of the four axioms,
and 1 for the conclusion]
Hint: See Question 3.2 in the Course Notes for an example of how
to write this down formally. See also Exercise 7 in Section 4.7 of
[Groups, C. R. Jordan and D. A. Jordan], available online via the
Library
Transcribed Image Text:(1) Let G = R \ {1}. the set of all real numbers except 1. Show that G, together with the operation * given by x * y = x + y = xy for all x, y Є G, is a group. [5: 1 for each of the four axioms, and 1 for the conclusion] Hint: See Question 3.2 in the Course Notes for an example of how to write this down formally. See also Exercise 7 in Section 4.7 of [Groups, C. R. Jordan and D. A. Jordan], available online via the Library
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