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JEE Mains · Maths · STD 11 - 4.1 complex nubers

\(\{ z = x + iy \in C :| z |-\operatorname{Re}( z ) \leq 1\}\) द्वारा निरुपित क्षेत्र निम्न में से किस असमता द्वारा भी दिया जाता है

  1. A \(y^{2} \geq x+1\)
  2. B \(y^{2} \geq 2(x+1)\)
  3. C \(y^{2} \leq x+\frac{1}{2}\)
  4. D \(y^{2} \leq 2\left(x+\frac{1}{2}\right)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(y^{2} \leq 2\left(x+\frac{1}{2}\right)\)

Step-by-step Solution

Detailed explanation

\(z = x +1 y\) \(Iz 1- ke ( z ) \leq 1\) \(\Rightarrow \sqrt{ x ^{2}+ y ^{2}}- x \leq 1\) \(\Rightarrow \sqrt{ x ^{2}+ y ^{2}} \leq 1+ x\) \(\Rightarrow x ^{2}+ y ^{2} \leq 1+2 x + x ^{2}\) \(\Rightarrow y ^{2} \leq 2 x +1\)…
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