$\mathop {\lim }\limits_{n \to \infty } \sum\limits_{k = 1}^n {\frac{k}{{{n^2} + {k^2}}}} $ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{2}\log 2$
  • B
    $\log 2$
  • C
    $\pi /4$
  • D
    $\pi /2$

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