If \( z^{2}-z+1=0 \) then \( z^{n}-z^{-n} \), where \( n \) is a multiple of 3 , is
(a) \( 2(-1)... VIDEO
If \( z^{2}-z+1=0 \) then \( z^{n}-z^{-n} \), where \( n \) is a multiple of 3 , ishttps://bit.ly/YTAI_PWAP https://www.pw.live
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