यदि $f(n) = \frac{1}{n} [(n+1)(n+2)(n+3) \ldots (2n)]^{\frac{1}{n}}$ है, तो $\lim_{n \rightarrow \infty} f(n) =$

  • A
    $\frac{4}{e}$
  • B
    $\log \left(\frac{4}{e}\right)$
  • C
    $\frac{2}{e}$
  • D
    $\log \left(\frac{2}{e}\right)$

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$\lim _{n}$ ${\rightarrow \infty}\left(\frac{1}{1+n^5}+\frac{2^4}{2^5+n^5}+\frac{3^4}{3^5+n^5}+\ldots+\frac{n^4}{n^5+n^5}\right)=$

$\lim _{n \rightarrow \infty} \left( \frac{\sqrt{1} + 2 \sqrt{2} + 3 \sqrt{3} + \ldots + n \sqrt{n}}{n^{5/2}} \right) = $

मान लीजिए $S = \frac{2}{1} {}^{n}C_{0} + \frac{2^{2}}{2} {}^{n}C_{1} + \frac{2^{3}}{3} {}^{n}C_{2} + \ldots + \frac{2^{n+1}}{n+1} {}^{n}C_{n}$ है। तो, $S$ का मान क्या है?

$\mathop {\lim }\limits_{n \to \infty } \left( \frac{1^2}{1^3 + n^3} + \frac{2^2}{2^3 + n^3} + \dots + \frac{n^2}{n^3 + n^3} \right)$ का मान ज्ञात कीजिए।

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$\mathop {\lim }\limits_{n \to \infty } \left[ {\frac{1}{n} + \frac{1}{{\sqrt {{n^2} + n} }} + \frac{1}{{\sqrt {{n^2} + 2n} }} + \dots + \frac{1}{{\sqrt {{n^2} + (n - 1)n} }}} \right]$ का मान ज्ञात कीजिए।

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