Question: From Dummit and Foote section 2.1 Let G be a group 2. In each of (a) - (e) prove that the specified subset is not

From Dummit and Foote section 2.1

Let G be a group

2. In each of (a) - (e) prove that the specified subset is not a subgroup of the given group: (b) the set of reflections in Den for n 2 3 (d) the set of (positive and negative) odd integers in Z together with 0

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