$\lim _{n \rightarrow \infty} \sum_{r=1}^n \frac{r^3}{r^4+n^4}$ का मान है

  • A
    $\frac{1}{2} \log _{e}(1 / 2)$
  • B
    $\frac{1}{4} \log _e(1 / 2)$
  • C
    $\frac{1}{4} \log _{e} 2$
  • D
    $\frac{1}{2} \log _{e} 2$

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