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

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

જો $x = \operatorname{sech}^{-1} \frac{1}{2} + \tanh^{-1} \frac{1}{2}$ હોય,તો $\cosh x =$

વિસ્તરણ $\log_e(1 + x) = \sum\limits_{i = 1}^\infty \left[ \frac{(-1)^{i + 1}x^i}{i} \right]$ માટે વ્યાખ્યાયિત છે:

અનંત શ્રેણી $\log _4 2 - \log _8 2 + \log _{16} 2 - \dots \infty$ નું મૂલ્ય શું છે?

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