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

  • A
    $\sum_{k=1}^{\infty} \frac{(-1)^k b^k}{k}$
  • B
    $\sum_{k=1}^{\infty} \frac{(-1)^{k-1} b^k}{k!}$
  • C
    $\sum_{k=1}^{\infty} \frac{(-1)^k b^k}{(k-1)!}$
  • D
    $\sum_{k=1}^{\infty} \frac{(-1)^{k-1} b^k}{(k+1)!}$

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Similar Questions

$\log_{3} e - \log_{9} e + \log_{27} e - \dots$ ની કિંમત કેટલી થાય?

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

$(0.5) - \frac{(0.5)^2}{2} + \frac{(0.5)^3}{3} - \frac{(0.5)^4}{4} + \dots$

શ્રેણી $\frac{1}{1 \times 2} - \frac{1}{2 \times 3} + \frac{1}{3 \times 4} - \dots \infty$ નો સરવાળો કેટલો થાય?

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

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