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

यदि रेखा \(x -1=0\), अतिपरवलय \(kx ^2- y ^2=6\) की एक नियता है, तो यह अतिपरवलय किस बिंदु से होकर जाता है ?

  1. A \((-2 \sqrt{5}, 6)\)
  2. B \((-\sqrt{5}, 3)\)
  3. C \((\sqrt{5},-2)\)
  4. D \((2 \sqrt{5}, 3 \sqrt{6})\)
Verified Solution

Answer & Solution

Correct Answer

(C) \((\sqrt{5},-2)\)

Step-by-step Solution

Detailed explanation

\(frac{x^{2}}{6 / k }-\frac{y^{2}}{6}=1\) \(e ^{2}=1+\frac{6}{6 / k }\) \(e =\sqrt{1+ k }\) \(a =\sqrt{\frac{6}{ k }}\) Eq. of directrix \(x=\frac{a}{e} \Rightarrow x=\sqrt{\frac{6}{k(k+1)}}\) \(\frac{6}{k(k+1)}=1\) \(k=2\) From eq.\((1)\), we get \(2 x^{2}-y^{2}=6\) Check…
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