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JEE Mains · Maths · STD 11 - 10.1 circle and system of circle

वृत्त \(x ^{2}+ y ^{2}=16\) पर रेखाओं \(x + y = n , n \in N\) जहाँ \(N\) सभी प्राकृत संख्याओं का समुच्चय है, द्वारा काटी गई जीवाओं की लंबाईयों के वर्गो का योग है

  1. A \(320\)
  2. B \(160\)
  3. C \(105\)
  4. D \(210\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(210\)

Step-by-step Solution

Detailed explanation

\(p = \frac{n}{{\sqrt 2 }}\), but \(\frac{n}{{\sqrt 2 }} < 4 \Rightarrow n = 1,2,3,4,5\) Length of chord \(AB = 2\sqrt {16 - \frac{{{n^2}}}{2}} \) \( = \sqrt {64 - 2{n^2}} = \ell \) (say) For \(n = 1,{\ell ^2} = 62\) \(n = 2,{\ell ^2} = 56\) \(n = 3,{\ell ^2} = 46\)…
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