એક ઉપવલય અતિવલય \(9x^2 - 4y^2 = 36\) ની નાભિમાંથી પસાર થાય અને તેની પ્રધાનઅક્ષ અને ગૌણઅક્ષ અનુક્રમે અતિવલયની મુખ્યઅક્ષ અને અનુબ્ધ્ધઅક્ષ પર છે જો બંને શંકવોના ઉત્કેન્દ્રતાનો ગુણાકાર \(\frac {1}{2}\) હોય તો નીચેનામાંથી ક્યું બિંદુ ઉપવલય પર આવેલ નથી.

A \(\left( {\sqrt {\frac{{13}}{2}} ,\sqrt 6 } \right)\)
B \(\left( {\frac{{\sqrt {39} }}{2},\sqrt 3 } \right)\)
C \(\left( {\frac{1}{2}\sqrt {13} ,\frac{{\sqrt 3 }}{2}} \right)\)
D \((\sqrt {13} ,0)\)

Verified Solution

Answer & Solution

Correct Answer

(C) \(\left( {\frac{1}{2}\sqrt {13} ,\frac{{\sqrt 3 }}{2}} \right)\)

Step-by-step Solution

Detailed explanation

Equation of hyperbola is \(\frac{{{x^2}}}{4} - \frac{{{y^2}}}{9} = 1\) Its foci \( = \left( { \pm \sqrt {13} ,0} \right)\) \(e = \frac{{\sqrt {13} }}{2}\) If \(e\), \(2\) the eccentricity of the ellipse, then…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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