3. List all of the elements in each of the following subgroups. b. The subgroup of $Z_{24}$ generated by 15 d. All subgroups of $Z_{60}$ h. The subgroup generated by 5 in $U(18)$ m. The subgroup of $C^*$ generated by $(1 + \sqrt{3}i)/2$
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We have that 15 = -9 (mod 24), so the subgroup is {0, 15, 3, 9, 21, 15, 3, 9, 21, ...}. This simplifies to {0, 3, 9, 15, 21}. Show more…
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