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Q.

The distance between the foci of an ellipse is equal to half of its minor axis then eccentricity is

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a

12

b

13

c

15

d

12

answer is A.

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Detailed Solution

Let ellipse be x2a2+y2b2=1 Given that SS'=12(Length of minor axis) 2ae=12(2b) ae=b a2e2=b2=a2(1-e2) 2e2=1 e=12

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