Question

 
$\frac{2}{3} i \: 1$
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Answer 1

$\frac{2}{3} i1 \\ 1 \times \frac{2}{3} i \\ r = 1 \times \frac{2}{3} \\ 0 = \frac{\pi}{2} \\ \otvet.1 \times \frac{2}{3} ( \cos( \frac{\pi}{2} ) + i \times \sin( \frac{\pi}{2} ) )$