Question: (3) For every group G, let Z(G) = {g E G|gh = hg for all h E G}. Show that Z (G) is a subgroup

(3) For every group G, let Z(G) = {g E G|gh

(3) For every group G, let Z(G) = {g E G|gh = hg for all h E G}. Show that Z (G) is a subgroup of G

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