$\frac{1}{1 \cdot 3} + \frac{1}{2 \cdot 5} + \frac{1}{3 \cdot 7} + \frac{1}{4 \cdot 9} + \dots$ का मान ज्ञात कीजिए।

  • A
    $2 \log_e 2 - 2$
  • B
    $2 - \log_e 2$
  • C
    $2 \log_e 4$
  • D
    $\log_e 4$

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