the product of the elements is the identity. 7 has order 2. of order 2.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.8: Some Results On Finite Abelian Groups (optional)
Problem 14E: Suppose that the abelian group G can be written as the direct sum G=C22C3C3, where Cn is a cyclic...
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Let G be a finite abelian group, and let 7 be the product of the elements
of G.
(a) Show that has order 1 or 2.
(b) Give an example of a group G of even order in which is the identity.
(c) Give an example of a group G of even order in which has order 2.
(d) Show that has order 2 iff G has a unique element of order 2.
Transcribed Image Text:Let G be a finite abelian group, and let 7 be the product of the elements of G. (a) Show that has order 1 or 2. (b) Give an example of a group G of even order in which is the identity. (c) Give an example of a group G of even order in which has order 2. (d) Show that has order 2 iff G has a unique element of order 2.
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