3.38. Let H and K be subgroups of G. Show that H U K is a subgroup of G if and only if either HC K or K C H.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 12E: Let H and K be subgroups of a group G and K a subgroup of H. If the order of G is 24 and the order...
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3.38. Let H and K be subgroups of G. Show that H U K is a subgroup of G if and
only if either HC K or K C H.
Transcribed Image Text:3.38. Let H and K be subgroups of G. Show that H U K is a subgroup of G if and only if either HC K or K C H.
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