$\mathop {\lim }\limits_{x \to 0} \frac{{{e^{1/x}} - 1}}{{{e^{1/x}} + 1}} = $

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $\text{अस्तित्व में नहीं है}$

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यदि ${S_n} = \sum\limits_{k = 1}^n {{a_k}} $ और $\mathop {\lim }\limits_{n \to \infty } {a_n} = a,$ है,तो $\mathop {\lim }\limits_{n \to \infty } \frac{{{S_{n + 1}} - {S_n}}}{{\sqrt {\sum\limits_{k = 1}^n k } }}$ का मान ज्ञात कीजिए।

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$\lim _{x \rightarrow \infty} \frac{(3-x)^{25}(6+x)^{35}}{(12+x)^{38}(9-x)^{22}} = $

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