The two vectors 1 1 1 and 1 a a2 where...

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The two vectors [1 1 1] and [1, a, a²], where \[{\text{a}} = \left( { - \frac{1}{2} + {\text{j}}\frac{{\sqrt 3 }}{2}} \right)\] , are

A. orthonormal

B. orthogonal

C. parallel

D. collinear

Answer: Option B

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