यदि $\lim_{x}$ ${\rightarrow 0} \left\{ \frac{1}{x^{8}} \left( 1 - \cos \frac{x^{2}}{2} - \cos \frac{x^{2}}{4} + \cos \frac{x^{2}}{2} \cos \frac{x^{2}}{4} \right) \right\} = 2^{-k}$ है,तो $k$ का मान ज्ञात कीजिए।

  • A
    $-8$
  • B
    $8$
  • C
    $10$
  • D
    $-10$

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सीमा ज्ञात कीजिए: $\mathop {\lim }\limits_{x \to 2} \left[\frac{x^{2}-4}{x^{3}-4 x^{2}+4 x}\right]$

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