$i \log \left( \frac{x - i}{x + i} \right)$ એ $(x \in R)$ માટે કોના બરાબર છે?

  • A
    $\pi + 2 \tan^{-1} x$
  • B
    $\pi - 2 \tan^{-1} x$
  • C
    $-\pi + 2 \tan^{-1} x$
  • D
    $-\pi - 2 \tan^{-1} x$

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