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JEE Main & Advanced Mathematics Conic Sections Question Bank Ellipse

  • question_answer
    If distance between the directrices be thrice the distance between the foci, then eccentricity of ellipse is

    A)            1/2 

    B)            2/3

    C)            \[1/\sqrt{3}\]                            

    D)            4/5

    Correct Answer: C

    Solution :

               According to the condition, \[\frac{2a}{e}=6ae\] Þ \[e=\frac{1}{\sqrt{3}}\].


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