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

माना अतिपरवलय \(\frac{ x ^2}{ a ^2}-\frac{ y ^2}{ b ^2}=1\) की उत्केन्द्रियता \(\frac{5}{4}\) है। यदि अतिपरवलय के बिन्दु \(\left(\frac{8}{\sqrt{5}}, \frac{12}{5}\right)\) पर अभिलम्ब का समीकरण \(8 \sqrt{5} x +\beta y =\lambda\) हो तो \(\lambda-\beta\) बराबर होगा \(-\)

  1. A \(89\)
  2. B \(85\)
  3. C \(78\)
  4. D \(45\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(85\)

Step-by-step Solution

Detailed explanation

\(e ^{2}=1+\frac{ b ^{2}}{ a ^{2}}=\frac{25}{16} \Rightarrow \frac{ b ^{2}}{ a ^{2}}=\frac{9}{16} \ldots \ldots(1)\) \(A \left(\frac{8}{\sqrt{5}}, \frac{12}{5}\right)\) satisfies \(\frac{ x ^{2}}{ a ^{2}}-\frac{ y ^{2}}{ b ^{2}}=1\)…
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