$\mathop {\text{Lim}}\limits_{n \to \infty } \,\,\sum\limits_{r = 1}^{4n} {\frac{{\sqrt n }}{{\sqrt r {{\left( {\,3\sqrt r + 4\sqrt n \,} \right)}^2}}}} $ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{{35}}$
  • B
    $\frac{1}{{14}}$
  • C
    $\frac{1}{{10}}$
  • D
    $\frac{1}{5}$

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$\lim _{n \rightarrow \infty}\left[\frac{1}{n}+\frac{n}{(n+1)^{2}}+\frac{n}{(n+2)^{2}}+\ldots+\frac{n}{(2 n-1)^{2}}\right]$ का मान ...... है।

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