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

વક્રો \(x=2 y^2\) અને \(x=1+y^2\) ના સામાન્ય સ્પર્શક \(y = m x+ c , m > 0\) થી બિંદુ \((6,-2 \sqrt{2})\)નું અંતર \(..............\) છે.

  1. A \(\frac{1}{3}\)
  2. B \(5\)
  3. C \(\frac{14}{3}\)
  4. D \(5 \sqrt{3}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(5\)

Step-by-step Solution

Detailed explanation

For \(y ^2=\frac{ x }{2}, T : y = mx +\frac{1}{8 m }\) For tangent to \(y ^2+1= x\) \(\Rightarrow\left( mx +\frac{1}{8 m }\right)^2+1= x\) \(D =0 \Rightarrow m =\frac{1}{2 \sqrt{2}}\) \(\therefore T : x -2 \sqrt{2} y +1=0\) \(d =\left|\frac{6+8+1}{\sqrt{9}}\right|=5\)
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