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

वक्र \(x ^{2}+2 xy -3 y ^{2}=0\) के बिन्दु \((2,2)\) पर खींचे गये अभिलम्ब पर मूल बिन्दु से डाले गये लम्ब की लम्बाई है।

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

Answer & Solution

Correct Answer

(B) \(2 \sqrt{2}\)

Step-by-step Solution

Detailed explanation

\(x^{2}+2 x y-3 y^{2}=0\) \(\mathrm{m}_{\mathrm{N}}=\) slope of normal drawn to curve at \((2,2)\) is \(-1\) \(\mathrm{L}: \mathrm{x}+\mathrm{y}=4\) perpendicular distance of \(L\) from \((0,0)\) \(=\frac{|0+0-4|}{\sqrt{2}}=2 \sqrt{2}\)
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