1.

Let ω is the root of the equation x2+x+1=0 whose imiginary part is postive and |z−ω|=|z+ω|, then arg(z) is

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Let ω is the root of the equation x2+x+1=0 whose imiginary part is postive and |zω|=|z+ω|, then arg(z) is



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