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JEE Mains · Maths · STD 11 - 4.1 complex nubers

बहुभुज का क्षेत्रफल, जिसके शीर्ष समीकरण \(\bar{z}=i z^2\) के अवास्तविक मूल है, होगा :

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

Answer & Solution

Correct Answer

(C) \(\frac{3 \sqrt{3}}{4}\)

Step-by-step Solution

Detailed explanation

\(\Rightarrow\) Let \(z=x+i y, x, y \in R\) Now \(\bar{z}=i z^{2}\) then \(x-i y=i\left(x^{2}-y^{2}+2 x y i\right)\) \(x-i y=i\left(x^{2}-y^{2}\right)-2 x y\) \(\Rightarrow x=-2 x y\;and \;-y=x^{2}-y^{2}\) \(\Rightarrow x (1+2 y )=0\) \(x=0\) or \(y=-\frac{1}{2}\) Put \(x=0\) in…
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