$\frac{1}{1!} + \frac{1 + 2}{2!} + \frac{1 + 2 + 2^2}{3!} + .....\infty = $

  • A
    $e^2$
  • B
    $e^2 - 1$
  • C
    $e^2 - e$
  • D
    $e^3 - e^2$

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Similar Questions

જો $x=1+\frac{1}{2 \times 1 !}+\frac{1}{4 \times 2 !}+\frac{1}{8 \times 3 !}+\ldots$ અને $y=1+\frac{x^{2}}{1 !}+\frac{x^{4}}{2 !}+\frac{x^{6}}{3 !}+\ldots$ હોય, તો $\log_{e} y$ ની કિંમત શોધો.

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

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

શ્રેણી $1 + \frac{x^2}{2!} + \frac{x^4}{4!} + \dots$ નો અનંત સુધીનો સરવાળો શું છે?

$\sum_{k=1}^{\infty} \frac{1}{k !} \left(\sum_{n=1}^k 2^{n-1}\right)$ ની કિંમત શોધો.

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