If the vertices of a triangle are \( 8+5 i,-3+i,-2-3 i \), the modulus and the argument of the c....

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If the vertices of a triangle are \( 8+5 i,-3+i,-2-3 i \),
\( \mathrm{P} \)
the modulus and the argument of the complex number
W
representing the centroid of this triangle respectively are
(1) \( 2, \frac{\pi}{4} \)
(2) \( \sqrt{2}, \frac{\pi}{4} \)
(3) \( 2 \sqrt{2}, \frac{\pi}{4} \)
(4) \( 2 \sqrt{2}, \frac{\pi}{2} \)


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