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Question

If S and S are the foci of the ellipse x225+y216=1, and P is any point on it, then the range of values of SPSP is

A
9f(θ)16
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B
9f(θ)25
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C
16f(θ)25
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D
1f(θ)16
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Solution

The correct option is A 9f(θ)16
x225+y216=1
1SP+1SQ=2ab21SP+1SQ=2(5)16=58
SP+SQ=2a
=2(5)=10

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