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(4) Write the quaternion group in the usual fashion as Qs = {1,-1, i, -i, j, - j, k, -k) and consider the subgroup H = {1,-1)

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soin. Quaternion Group: it is denoted by Q8 08 ={ 1,-1,tts tj #k | Lj=-jke-ik ,12=j2=K2--1} Q8= {x, y 1x40 1 , x²=y², yxyl

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