જો $S = \frac{1}{1 \times 2} - \frac{1}{2 \times 3} + \frac{1}{3 \times 4} - \frac{1}{4 \times 5} + \dots + \infty$ હોય,તો $e^S = $

  • A
    $\log_e \left( \frac{4}{e} \right)$
  • B
    $\frac{4}{e}$
  • C
    $\log_e \left( \frac{e}{4} \right)$
  • D
    $\frac{e}{4}$

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શ્રેણીનો સરવાળો શોધો: $\log_e \frac{4}{5} + \frac{1}{4} - \frac{1}{2} \left( \frac{1}{4} \right)^2 + \frac{1}{3} \left( \frac{1}{4} \right)^3 - \dots$

$\log _4 2 - \log _8 2 + \log _{16} 2 - \ldots$ ની કિંમત શોધો.

$\frac{1}{3} + \frac{1}{2 \cdot 3^2} + \frac{1}{3 \cdot 3^3} + \frac{1}{4 \cdot 3^4} + \dots \infty = $

આપેલ શ્રેણી $\frac{1}{n} - \frac{1}{2n^2} + \frac{1}{3n^3} - \frac{1}{4n^4} + \dots$ નો અનંત સુધીનો સરવાળો શું થાય?

$1 + \frac{2}{3} - \frac{2}{4} + \frac{2}{5} - \dots \infty = $

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