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

  • A
    ${\log_e} \frac{4}{e}$
  • B
    ${\log_e} \frac{e}{4}$
  • C
    ${\log_e} 4$
  • D
    ${\log_e} 2$

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Similar Questions

$\frac{2}{1} \cdot \frac{1}{3} + \frac{3}{2} \cdot \frac{1}{9} + \frac{4}{3} \cdot \frac{1}{27} + \frac{5}{4} \cdot \frac{1}{81} + \dots \infty = $

જો $|a| < 1$ અને $b = \sum_{k=1}^{\infty} \frac{a^k}{k}$ હોય,તો $a$ ની કિંમત શું થાય?

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

$1+\frac{1}{3 \cdot 2^2}+\frac{1}{5 \cdot 2^4}+\frac{1}{7 \cdot 2^6}+\ldots$ ની કિંમત શોધો.

$\log_e x - \log_e (x - 1) = $

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