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10-2. Parabola, Ellipse, Hyperbola
easy

અતિવલય $16x^2 - 9y^2 = 14$ નો નાભિલંબની લંબાઈ મેળવો.

A

$16/3$

B

$32/3$

C

$8/3$

D

$4/3$

Solution

Given equation of hyperbola-

$16 x ^2-9 y ^2=144$

$\Rightarrow \frac{ x ^2}{9}-\frac{ y ^2}{16}=1$

Here $a=3, b=4$

Now,

Eccentricity $( e )=\pm \sqrt{1+\frac{ b ^2}{ a ^2}}=\pm \sqrt{1+\frac{16}{9}}=\pm \frac{5}{3}$

Length of latus rectum $(1)=\frac{2 b^2}{a}=\frac{2 \times 16}{3}=\frac{32}{9}$

Hence the eccentricity and length of latus rectum of the given hyperbola is $\pm \frac{5}{3}$ and $\frac{32}{9}$ respectively.

Standard 11
Mathematics

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