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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 16

  • question_answer
    The value of\[\frac{56}{\pi }\sum\limits_{k=1}^{\infty }{{{\tan }^{-1}}}\left( \frac{2k}{2+{{k}^{2}}+{{k}^{4}}} \right)\]is_______.

    Answer:

    14


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