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A point P lies on the ellipe ((y-1)^(2))...

A point P lies on the ellipe `((y-1)^(2))/(64)+((x+2)^(2))/(49)=1` . If the distance of P from one focus is 10 units, then find its distance from other focus.

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The correct Answer is:
6
for given ellipse a=7 and b=8.
Let P be any point on the ellipse, then SP+S'P=2b=16
Givn SP=10 then SP=6
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