यदि $\mathop {\lim }\limits_{x \to 0} \frac{{\log (3 + x) - \log (3 - x)}}{x} = k$ है,तो $k$ का मान ज्ञात कीजिए।

  • A
    $0$
  • B
    $-\frac{1}{3}$
  • C
    $\frac{2}{3}$
  • D
    $-\frac{2}{3}$

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