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

જો \(P (3,3)\) એ અતિવલય \(\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1\) પરનું એક બિંદુ છે અને બિંદુ \(P\) આગળનો અભિલંબ \(x\)-અક્ષને બિંદુ \((9,0)\) આગળ છેદે અને \(e\) તેની ઉત્કેન્દ્ર્તા હોય તો \(\left( a ^{2}, e ^{2}\right)\) ની કિમત શોધો 

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

Answer & Solution

Correct Answer

(A) \(\left(\frac{9}{2}, 3\right)\)

Step-by-step Solution

Detailed explanation

since, (3,3) lies on \(\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1\) \(\frac{9}{a^{2}}-\frac{9}{b^{2}}=1\) Now, normal at (3,3) is \(y-3=-\frac{a^{2}}{b^{2}}(x-3)\) which passes through \((9,0) \Rightarrow b ^{2}=2 a ^{2} \quad \ldots .(2)\) So,…
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