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JEE Mains · Maths · STD 11 - 4.1 complex nubers

यदि \(z _{1}\) तथा \(z _{2}\) दो ऐसी सम्मिश्र संख्याएँ हैं, जिनके लिए \(\operatorname{Re}\left(z_{1}\right)=\left|z_{1}-1\right|, \quad \operatorname{Re}\left(z_{2}\right)=\left|z_{2}-1\right|\) तथा \(\arg \left( z _{1}- z _{2}\right)=\frac{\pi}{6}\) हैं, तो \(\operatorname{Im}\left( z _{1}+ z _{2}\right)\) बराबर है

  1. A \(\frac{\sqrt{3}}{2}\)
  2. B \(\frac{2}{\sqrt{3}}\)
  3. C \(\frac{1}{\sqrt{3}}\)
  4. D \(2 \sqrt{3}\)
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Answer & Solution

Correct Answer

(D) \(2 \sqrt{3}\)

Step-by-step Solution

Detailed explanation

\(\operatorname{Re}(z)=|z-1|\) \(\Rightarrow \quad x=\sqrt{(x-1)^{2}+(y-0)^{2}} \quad(x>0)\) \(\Rightarrow \quad y^{2}=2 x-1=4 \cdot \frac{1}{2}\left(x-\frac{1}{2}\right)\) \(\Rightarrow\) a parabola with focus \((1,0)\) and directrix as imaginary axis. \(\therefore \quad\)…
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