If the distance between the foci of an ellipse is 6 and the distance between its directrices is ....

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If the distance between the foci of an ellipse is 6 and
\( \mathrm{P} \)
the distance between its directrices is 12 , then the
W
length of its latus rectum is
(1) \( 2 \sqrt{3} \)
(2) \( \sqrt{3} \)
(3) \( \frac{3}{\sqrt{2}} \)
(4) \( 3 \sqrt{2} \)
.


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