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

જો પરવલય \(y^2 = 4b\,(x -c)\) અને \(y^2 = 8ax\) ને સામાન્ય અભિલંબ હોય તો નીચેનામાંથી કઈ \((a, b, c)\) ની જોડ સાચી છે ?

  1. A \(\left( {\frac{1}{2},2,3} \right)\)
  2. B \((1, 1, 3)\)
  3. C \(\left( {\frac{1}{2},2,0} \right)\)
  4. D \((1, 1, 0)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \((1, 1, 3)\)

Step-by-step Solution

Detailed explanation

Normal to there \(2\) curves are \(y = m\left( {x - c} \right) - 2bm - b{m^3}\) \(y = mx - 4am - 2a{m^3}\) If they how a common normal \(\left( {c + 2b} \right) - 4a = \left( {2a - b} \right){m^2}\) (\(m=0\) corresponds axis ) \( \Rightarrow {m^2} = \frac{c}{{2a - b}} - 2 < 0\)…
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