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JEE Mains · Maths · STD 11 - 4.1 complex nubers

\(z \in C\) માટે જો  \((|z-3 \sqrt{2}|+|z-p \sqrt{2} i|)\) ની ન્યૂનતમ કિમંત  \(5 \sqrt{2}\) હોય તો  \(P\) ની કિમંત \(.......\) થાય.

  1. A \(3\)
  2. B \(\frac{7}{2}\)
  3. C \(4\)
  4. D \(\frac{9}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(4\)

Step-by-step Solution

Detailed explanation

It is sum of distance of \(z\) from \((3 \sqrt{2}, 0)\) and \((0, p \sqrt{2})\) For minimising, \(z\) should lie on \(A B\) and \(A B=5 \sqrt{2}\) \((A B)^{2}=18+2 p^{2}\) \(p=\pm 4\)
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