jee-advanced 1998 Q7

jee-advanced · India Conic sections Intersection of Circles or Circle with Conic

7. If $P = ( x , y ) , F 1 = ( 3,0 ) , F 2 = ( - 3,0 )$ and $16 x 2 + 25 y 2 = 400$, then PF1 + PF2equals1 :
(A) 8
(B) 6
(C) 10
(D) 12

7. If $P = ( x , y ) , F 1 = ( 3,0 ) , F 2 = ( - 3,0 )$ and $16 x 2 + 25 y 2 = 400$, then PF1 + PF2equals1 :\\
(A) 8\\
(B) 6\\
(C) 10\\
(D) 12\\