UPSC NDA I 2023 Mathematics Solved Paper
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Consider the following for the next two (02) items that follow :
P ( x , y ) is any point on the ellipse x 2 + 4 y 2 = 1 . Let E , F be the foci of the ellipse.
[NDA I 2023]
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What is P E + P F equal to ?
[NDA I 2023]
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