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JEE Mains · Maths · STD 12 - 6. Application of derivatives

वक्र \(x^{2} y^{2}-2 x=4(1-y)\) के बिंदु \((2,-2)\) पर खींची गई स्पर्शरेखा निम्न में से किस बिंदु से नहीं गुजरती है

  1. A \(\left( {4,\frac{1}{3}} \right)\)
  2. B \((8, 5)\)
  3. C \((-4, -9)\)
  4. D \((- 2, - 7)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \((- 2, - 7)\)

Step-by-step Solution

Detailed explanation

\({x^2}{y^2} - 2x = 4 - 4y\) Differentiate w.r.t.\('x'\) \(2x{y^2} + 2y.{x^2}.\frac{{dy}}{{dx}} - 2 = - 4.\frac{{dy}}{{dx}}\) \(\frac{{dy}}{{dx}}\left( {2y.{x^2} + 4} \right) = 2 - 2x.{y^2}\)…
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