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Q.

The ascending order of distance between foci for the ellipses.

A : x28+y22=1           B: x210+y23=1

C : x211+y213=1          D : x29+y225=1

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a

A, B, C, D

b

D, C, B, A

c

C, A, D, B

d

C, A, B, D

answer is D.

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Detailed Solution

A:2ae=28-2            =26 B:2ae=210-3            =27 C:2be=213-11             =22 D:2be=225-9             =216 C < A < B < D  

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