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Question

The distance of the point P(x1,5) from the foci of the ellipse x29+y225=1 are (where P lies on ellipse)

A
2 unit
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B
9 unit
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C
1 unit
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D
7 unit
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Solution

The correct option is C 1 unit
Ii's major axis is parallel to yaxis
Equation of ellipse
x2a2+y2b2=1
a=3, b=5 e=45
Distance from the foci is
d=b±ey1
​​​​​​​d=5±4=1,9 unit

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