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Tardigrade
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Mathematics
If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is -
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Q. If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is -
Conic Sections
A
$\frac{1}{2}$
B
$\frac{2}{3}$
C
$\frac{1}{\sqrt{3}}$
D
$\frac{4}{5}$
Solution:
Correct answer is (c) $\frac{1}{\sqrt{3}}$