If \( z_{1}, z_{2}, z_{3} \) are the affixes of vertices of an equilateral triangle, then \( \in...

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If \( z_{1}, z_{2}, z_{3} \) are the affixes of vertices of an equilateral triangle, then \( \int_{2}^{4}\left|\arg \left(\frac{2 z_{1}-z_{2}-z_{3}}{2\left(z_{3}-z_{2}\right)}\right)\right| d x= \)
(a) \( \pi \)
(b) \( \frac{2 \pi}{3} \)
(c) \( \frac{\pi}{2} \)
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