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JEE Mains · Maths · STD 11 - 10.2 parabola,ellipse,hyperbola

माना अतिपरवलय \(\mathrm{H}\) की नाभियाँ \(\mathrm{A}(1 \pm \sqrt{2}, 0)\) तथा उत्केन्द्रता \(\sqrt{2}\) है। तो \(\mathrm{H}\) की नाभिलंब जीवा की लंबाई है :

  1. A \(2\)
  2. B \(3\)
  3. C \(\frac{5}{2}\)
  4. D \(\frac{3}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(2\)

Step-by-step Solution

Detailed explanation

\(2 ae =|(1+\sqrt{2})-(1+\sqrt{2})|=2 \sqrt{2}\) \(ae =\sqrt{2}\) \(a =1\) \(\Rightarrow b =1 \quad \because e =\sqrt{2} \Rightarrow \text { Hyperbola is rectangular }\) \(\Rightarrow \text { L.R }=\frac{2 b ^2}{ a }=2\)
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