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

यदि परवलय \(y ^{2}= x\) के एक बिन्दु \((\alpha, \beta),(\beta>0)\) पर, स्पर्श रेखा, दीर्घवृत्त \(x ^{2}+2 y ^{2}=1\) की भी स्पर्श रेखा है, तो \(\alpha\) बराबर है 

  1. A \(2\sqrt 2  + 1\)
  2. B \(\sqrt 2  - 1\)
  3. C \(\sqrt 2  + 1\)
  4. D \(2\sqrt 2  - 1\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\sqrt 2  + 1\)

Step-by-step Solution

Detailed explanation

Equation of tangent to the parabola \({y^2} = x\) \(At\left( {\alpha ,\beta } \right)\) is \(T=0\) \(y\beta = \frac{{x + \alpha }}{2}\) \( \Rightarrow y\beta = \frac{{x + {\beta ^2}}}{2}\,\) (\(\because\) \({\beta ^2} = \alpha \))…
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