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

परवलयों \(y^{2}=4 x\) तथा \(x^{2}=-32 y\) दोनों को स्पर्श करने वाली रेखा की प्रवणता है:

  1. A \(\frac{1}{8}\)
  2. B \(\frac{2}{3}\)
  3. C \(\frac{1}{2}\)
  4. D \(\frac{3}{2}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\frac{1}{2}\)

Step-by-step Solution

Detailed explanation

\(y^{2}=4 x\) \(\Longrightarrow a=1\) \(x^{2}=-32 y\) \(\Longrightarrow a=-8\) tangent to the parabola \(y^{2}=4 x\) is \(y=m x+\frac{a}{m}\) \(\Longrightarrow y=m x+\frac{1}{m}---(1)\) tangent to the parabola \(x^{2}=-32 y\) is \(y=m x+a m^{2}\)…
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