w = omega.
if w is a complex cube root of unity show the above equation.
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Answer:
a+bw+cw2/c+aw+bw2
as,w3=1
=aw3+bw4+cw2/c+aw+bw2
=w2(aw+bw2+c)/(c+aw+bw2)
=w2
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