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

यदि परवलय \(\mathrm{x}=4 \mathrm{y}^2\) पर बिंन्दु \(\mathrm{P}(\mathrm{h}, \mathrm{k})\) बिंन्दु \(\mathrm{Q}(0,33)\) के निकटतम है, तो \(\mathrm{P}\) की परवलय \(y^2=4(x+y)\) की नियता से दूरी बराबर है :

  1. A \(2\)
  2. B \(4\)
  3. C \(8\)
  4. D \(6\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(6\)

Step-by-step Solution

Detailed explanation

Equation of normal \(y=-t x+2 a t+a t^3\) \(y=-t x+\frac{2}{16} t+\frac{1}{16} t^3\) It passes through \((0,33)\) \(33=\frac{ t }{8}+\frac{ t ^3}{16}\) \(t ^3+2 t -528=0\) \(( t -8)\left( t ^2+8 t +66\right)=0\) \(t =8\)…
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