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

यदि दो बिन्दुओं \(A\) तथा \(B\) के निर्देशांक क्रमशः \((\sqrt{7}, 0)\) तथा \((-\sqrt{7}, 0)\) हैं और शांकव (conic) \(9 x ^{2}+16 y ^{2}\) \(=144\) पर कोई बिन्दु \(P\) है, तो \(PA + PB\) बराबर है

  1. A \(8\)
  2. B \(6\)
  3. C \(16\)
  4. D \(9\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(8\)

Step-by-step Solution

Detailed explanation

\(\frac{x^{2}}{16}+\frac{y^{2}}{9}=1\) \(a =4 ; b =3 ; e =\sqrt{\frac{16-9}{16}}=\frac{\sqrt{7}}{4}\) A and \(B\) are foci \(\Rightarrow PA + PB =2 a =2 \times 4=8\)
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