A) \[\omega ,\,{{\omega }^{3}}\]
B) \[-i,\,\,i\]
C) \[-1,\,1\]
D) \[\omega ,\,\,{{\omega }^{2}}\]
Correct Answer: D
Solution :
Since \[{{(\omega )}^{2}}={{\omega }^{2}}\]and \[{{({{\omega }^{2}})}^{2}}={{\omega }^{4}}=\omega {{\omega }^{3}}=\omega \]
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