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

  • A
    $-\frac{1}{x^{2}}$
  • B
    $\frac{1}{x^{2}}$
  • C
    $-\frac{1}{x}$
  • D
    $\frac{1}{x}$

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