मान लीजिए, $f(x)=e^{-\sqrt{x}}+e^{-\frac{1}{x^2}}$. यदि $f^{\prime \prime}(x)=\alpha \cdot \frac{e^{-\sqrt{x}}}{x}\left(1+\frac{1}{\sqrt{x}}\right)+\beta \cdot \frac{e^{-\frac{1}{x^2}}}{x^4}\left(3-\frac{2}{x^2}\right)$, तो $(\alpha, \beta)=$

  • A
    $\left(\frac{1}{4}, 2\right)$
  • B
    $\left(\frac{1}{4},-2\right)$
  • C
    $\left(-\frac{1}{4}, 2\right)$
  • D
    $\left(-\frac{1}{4},-2\right)$

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$\frac{d^2x}{dy^2} = $

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