કિંમત શોધો: $\log_e \sqrt{\frac{1+x}{1-x}}$

  • A
    $x + \frac{x^3}{3} + \frac{x^5}{5} + \dots$
  • B
    $2 \left[ x + \frac{x^3}{3} + \frac{x^5}{5} + \dots \infty \right]$
  • C
    $2 \left[ x^2 + \frac{x^4}{4} + \frac{x^6}{6} + \dots \infty \right]$
  • D
    આમાંથી કોઈ નહીં

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