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

यदि रेखा \(y = mx + c\) अतिपरवलय \(\frac{ x ^{2}}{100}-\frac{ y ^{2}}{64}=1\) तथा वृत्त \(x ^{2}+ y ^{2}=36\) की एक उभयनिष्ठ स्पर्श रेखा है, तो निम्न में से कौनसा एक सही है ?

  1. A \(5 m =4\)
  2. B \(4 c^{2}=369\)
  3. C \(c^{2}=369\)
  4. D \(8 m+5=0\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(4 c^{2}=369\)

Step-by-step Solution

Detailed explanation

\(y=m x+c\) is tangent to \(\frac{x^{2}}{100}-\frac{y^{2}}{64}=1\) and \(x^{2}+y^{2}=36\) \(c^{2}=100 m^{2}-64 l c^{2}=36\left(1+m^{2}\right)\) \(\Rightarrow 100 m ^{2}-64=36+36 m ^{2}\) \(m ^{2}=\frac{100}{64} \Rightarrow m =\pm \frac{10}{8}\)…
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