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If e1 and e2 are the eccentricities of a...

If `e_1 and e_2` are the eccentricities of a hyperbola and its conjugate then prove that `(1)/(e_1^2)+(1)/(e_2^2)=1`.

A

0

B

`(1)/(4)`

C

`(1)/(2)`

D

1

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The correct Answer is:
D
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