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

माना परवलय \(y ^2-2 x -2 y =1\) के बिन्दुओं \(A (1,3)\) तथा \(B (1,-1)\) पर स्पर्श रेखाएँ बिंदु \(P\) पर मिलती हैं। तो त्रिभुज \(PAB\) के क्षेत्रफल (वर्ग इकाई में) है :-

  1. A \(4\)
  2. B \(6\)
  3. C \(7\)
  4. D \(8\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(8\)

Step-by-step Solution

Detailed explanation

Given curve : \(y^{2}-2 x-2 y=1\). Can be written as \((y-1)^{2}=2(x+1)\) Can be plotted as shown in figure Tangent at \(A: 2 y-x-5=0\) \({using\,T=0}\) Intersection with \(y=1\) is \(x=-3\) Hence, point \(P\) is \((-3,1)\) Taking advantage of symmetry Area of…
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