Groups and FieldsEasyCosets and Lagrange's Theorem ShareCosets and Lagrange's Theorem · Easy problemIn Z36\mathbb Z_{36}Z36, let H=⟨9⟩H = \langle 9\rangleH=⟨9⟩. What is [Z36:H][\mathbb Z_{36}:H][Z36:H], the index of HHH?Check Show answer Walk through it step by step Practice more like this Review this concept