$1 + \frac{3}{1!} + \frac{5}{2!} + \frac{7}{3!} + ....\infty = $

  • A
    $e$
  • B
    $2e$
  • C
    $3e$
  • D
    $4e$

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જો $\cosh (x-\log 3)=\sinh x$ હોય,તો $x=$

$\frac{1}{1!} + \frac{4}{2!} + \frac{7}{3!} + \frac{10}{4!} + \dots \infty = $

$(1 + x + x^2)e^{-x}$ ના વિસ્તરણમાં $x^2$ નો સહગુણક શોધો.

$\frac{e^{7x}+e^x}{e^{3x}}$ ના વિસ્તરણમાં $x^n$ નો સહગુણક શું છે?

$1+\frac{1+2}{2 !}+\frac{1+2+2^2}{3 !}+\ldots$ ની કિંમત શોધો.

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