यदि $\alpha = \lim_{x \rightarrow 0} \frac{x \cdot 2^x - x}{1 - \cos x}$ और $\beta = \lim_{x \rightarrow 0} \frac{x \cdot 2^x - x}{\sqrt{1+x^2} - \sqrt{1-x^2}}$,तो

  • A
    $\alpha = \beta$
  • B
    $\alpha = 2\beta$
  • C
    $\alpha = \frac{\beta}{2}$
  • D
    $\alpha = 3\beta$

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