योगफल की सीमा के रूप में $\int_2^3 x^2 dx$ का मूल्यांकन कीजिए।

  • A
    $\frac{72}{6}$
  • B
    $\frac{53}{9}$
  • C
    $\frac{25}{7}$
  • D
    $\frac{19}{3}$

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मान लीजिए $S_n = \sum_{k=1}^n \frac{n}{n^2+kn+k^2}$ और $T_n = \sum_{k=0}^{n-1} \frac{n}{n^2+kn+k^2}$ जहाँ $n=1, 2, 3, \ldots$ है। तो,

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