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Question

PSQ is a focal chord of the ellipse x24+y29 = 1 then 1SP+1SQ =


A

23

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B

32

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C

43

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D

49

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Solution

The correct option is B

32


x24+y29 = 1, e = 149 = 53, Length of the lactus rectum = 2a2b = 2×43 = 83

1SP+1SQ = 2l = 32


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