फलन $\log (\log x)$ का द्वितीय कोटि का अवकलज ज्ञात कीजिए।

  • A
    $\frac{-(1+\log x)}{(x \log x)^2}$
  • B
    $\frac{1+\log x}{(x \log x)^2}$
  • C
    $\frac{-(1-\log x)}{(x \log x)^2}$
  • D
    $\frac{1-\log x}{(x \log x)^2}$

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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 $(\alpha, \beta)=$

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