If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is

If distance between the directrices be thrice the distance between the

1.	If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is
A.	1/2
B.	2/3
C.	\[1/\sqrt{3}\]
D.	4/5
Answer» D. 4/5

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If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is

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