$\sum\limits_{m = 1}^n {{{\tan }^{ - 1}}} \left( {\frac{{2m}}{{{m^4} + {m^2} + 2}}} \right)$ का मान ज्ञात कीजिए।

  • A
    ${\tan ^{ - 1}}\left( {\frac{{{n^2} + n}}{{{n^2} + n + 2}}} \right)$
  • B
    ${\tan ^{ - 1}}\left( {\frac{{{n^2} - n}}{{{n^2} - n + 2}}} \right)$
  • C
    ${\tan ^{ - 1}}\left( {\frac{{{n^2} + n + 2}}{{{n^2} + n}}} \right)$
  • D
    इनमें से कोई नहीं

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