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JEE Main & Advanced Mathematics Conic Sections Question Bank Ellipse

  • question_answer
    P is any point on the ellipse\[9{{x}^{2}}+36{{y}^{2}}=324\]., whose foci are S and S?. Then \[SP+S'P\] equals [DCE 1999]

    A)            3     

    B)            12

    C)            36   

    D)            324

    Correct Answer: B

    Solution :

               \[SP+S'P=2a\]\[=2.6=12\].


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