2. Every group of index 2 is normal.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.2: Properties Of Group Elements
Problem 25E: 25. Prove or disprove that every group of order is abelian.
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Q3: (A) Prove that
2. Every group of index 2 is normal.
Transcribed Image Text:Q3: (A) Prove that 2. Every group of index 2 is normal.
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