AP and TS EAMCET Engineering Model Paper 16
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Question : 27 of 160
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If P ( x , y ) be any point on 16 x 2 + 25 y 2 = 400 and F 1 = ( 3 , 0 ) , F 2 = ( − 3 , 0 ) then P F 1 + P F 2 =
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