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JEE Mains · Maths · STD 11 - 4.1 complex nubers

જો \(z=x+\mathrm{i} y, x y \neq 0\) એ સમીકરણ \(z^2+\mathrm{i} \bar{z}=0\) નું સમાધાન કરે, તો \(\left|\mathrm{z}^2\right| =\) ...........

  1. A \(9\)
  2. B \(1\)
  3. C \(4\)
  4. D \(\frac{1}{4}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(1\)

Step-by-step Solution

Detailed explanation

\( z^2=-i \bar{z} \) \( \left|z^2\right|=|i \bar{z}|\) \( \left|z^2\right|=|z|\) \( |z|^2-|z|=0\) \( |z|(|z|-1)=0\) \( |z|=0 \text { (not acceptable) } \) \( \therefore|z|=1 \) \( \therefore|z|^2=1\)
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