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JEE Mains · Maths · STD 11 - 4.1 complex nubers

પ્રદેશ \(S=\{z \in \mathbb{C}:|z-1| \leq 2,(z=\bar{z})+i(z-\bar{z}) \leq 2 \operatorname{Im}(z) \geq 0\}\) નું ક્ષેત્રફળ ......... છે.

  1. A  \(\frac{7 \pi}{3}\)
  2. B \(\frac{3 \pi}{2}\)
  3. C \(\frac{17 \pi}{8}\)
  4. D \(\frac{7 \pi}{4}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{3 \pi}{2}\)

Step-by-step Solution

Detailed explanation

Put \(z=x+i y\) \( |z-1| \leq 2 \Rightarrow(x-1)^2+y^2 \leq 4 \) \( (z+\bar{z})+i(z-\bar{z}) \leq 2 \Rightarrow 2 x+i(2 i y) \leq 2 \) \( \Rightarrow x-y \leq 1 \) \( \operatorname{Im}(z) \geq 0 \Rightarrow y \geq 0\) Required area Area of semi-circle - area of sector A…
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