Gujarati
10-2. Parabola, Ellipse, Hyperbola
medium

एक अतिपरवलय के शीर्ष $(0, 0)$ तथा $(10, 0)$ और एक नाभि $(18, 0)$ है। अतिपरवलय का समीकरण है

A

$\frac{{{x^2}}}{{25}} - \frac{{{y^2}}}{{144}} = 1$

B

$\frac{{{{(x - 5)}^2}}}{{25}} - \frac{{{y^2}}}{{144}} = 1$

C

$\frac{{{x^2}}}{{25}} - \frac{{{{(y - 5)}^2}}}{{144}} = 1$

D

$\frac{{{{(x - 5)}^2}}}{{25}} - \frac{{{{(y - 5)}^2}}}{{144}} = 1$

Solution

(b) $2a = 10$,  \ $a = 5$

$ae – a = 8$ या $e = 1 + \frac{8}{5} = \frac{{13}}{5}$

$b = 5\sqrt {\frac{{{{13}^2}}}{{{5^2}}} – 1}  = 5 \times \frac{{12}}{5} = 12$

एवं अतिपरवलय का केन्द्र $ \equiv (5,\,0)$

$\frac{{{{(x – 5)}^2}}}{{{5^2}}} – \frac{{{{(y – 0)}^2}}}{{{{12}^2}}} = 1$.

Standard 11
Mathematics

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