જો $2 \sinh x = \cosh x$ હોય,તો $x =$

  • A
    $\frac{1}{3} \log 2$
  • B
    $2 \log 3$
  • C
    $\frac{1}{2} \log 3$
  • D
    $\log 9$

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$\frac{2}{1!} + \frac{4}{3!} + \frac{6}{5!} + \frac{8}{7!} + \dots \infty = $

$1 - \log 2 + \frac{(\log 2)^2}{2!} - \frac{(\log 2)^3}{3!} + \dots$ ની કિંમત શોધો.

$\sum_{n=1}^{\infty} \frac{2n^2+n+1}{n!}$ ની કિંમત શોધો.

શ્રેણી $\frac{1}{2!} - \frac{1}{3!} + \frac{1}{4!} - \dots$ નો અનંત પદ સુધીનો સરવાળો શોધો.

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$(2+3x)e^{-x}$ ના વિસ્તરણમાં $x^{10}$ નો સહગુણક શું છે?

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