JEE Math Practice Question
If the co-ordinates of two points A and B are $$\left( {\sqrt 7 ,0} \right)$$ and $$\left( { - \sqrt 7 ,0} \right)$$ respectively and P is any point on the conic, 9x2 + 16y2 = 144, then PA + PB is equal to :
- A.8
- B.9
- C.16
- D.6
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