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

माना \(y = mx + c , m >0\), परवलय \(y ^{2}=-64 x\) की नाभीय जीवा है तथा वत्त \((x+10)^{2}+y^{2}=4\) की स्पर्श रेखा है तो \(4 \sqrt{2}( m + c )\) का मान बराबर है ........... |

  1. A \(34\)
  2. B \(64\)
  3. C \(62\)
  4. D \(32\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(34\)

Step-by-step Solution

Detailed explanation

\(y^2=-64\) focus: \((-16,0)\) \(\mathrm{y}=\mathrm{mx}+\mathrm{c}\) is focal chord \(\Rightarrow \mathrm{c}=16 \mathrm{~m} \ldots \ldots\). \((1)\) \(y=m x+c\) is tangent to \((x+10)^{2}+y^{2}=4\) \(\Rightarrow y-m(x+10) \pm 2 \sqrt{1+m^{2}}\)…
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