Gujarati
10-2. Parabola, Ellipse, Hyperbola
medium

यदि  $e$ तथा $e’$ क्रमश: दीर्घवृत्त $5{x^2} + 9{y^2} = 45$ तथा  अतिपरवलय $5{x^2} - 4{y^2} = 45$ की उत्केन्द्रता हो, तो $ee' = $ 

A

$9$

B

$4$

C

$5$

D

$1$

Solution

(d) स्पष्टत: $e = \frac{2}{3}$ तथा $e' = \frac{3}{2}$,

$\therefore $ $ee'\, = 1.$

Standard 11
Mathematics

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