Gujarati
10-2. Parabola, Ellipse, Hyperbola
medium

बिन्दुओं $(3, 0)$ तथा $(3\sqrt 2 ,\;2)$ से गुजरने वाले अतिपरवलय की उत्केन्द्रता होगी

A

$\sqrt {13} $

B

$\frac{{\sqrt {13} }}{3}$

C

$\frac{{\sqrt {13} }}{4}$

D

$\frac{{\sqrt {13} }}{2}$

Solution

(b) $\frac{9}{{{a^2}}} = 1$ 

$a = 3$ व $\frac{{18}}{{{a^2}}} – \frac{4}{{{b^2}}} = 1$

$⇒ {b^2} = 4$

इसलिए $e = \sqrt {1 + \frac{4}{9}}  = \frac{{\sqrt {13} }}{3}$.

Standard 11
Mathematics

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