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

  • A
    $2$
  • B
    $-1$
  • C
    $1$
  • D
    $3$

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$\lim _{x}$ ${\rightarrow 1} \frac{(1-x)(1-x^2) \cdots (1-x^{2n})}{\{(1-x)(1-x^2) \cdots (1-x^n)\}^2} = \dots, \forall n \in N$

$\lim _{x \rightarrow 0} \frac{x}{|x|+x^2}$ का मान . है।

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