જો $x, y, z$ ત્રણ ક્રમિક ધન પૂર્ણાંકો હોય,તો $\frac{1}{2}\log_e x + \frac{1}{2}\log_e z + \frac{1}{2xz + 1} + \frac{1}{3}\left( \frac{1}{2xz + 1} \right)^3 + \dots = $

  • A
    $\log_e x$
  • B
    $\log_e y$
  • C
    $\log_e z$
  • D
    આમાંથી કોઈ નહીં

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$\frac{1}{1 \cdot 3} + \frac{1}{2 \cdot 5} + \frac{1}{3 \cdot 7} + \frac{1}{4 \cdot 9} + \dots$ ની કિંમત શોધો.

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