$1+\frac{1+2}{2 !}+\frac{1+2+2^2}{3 !}+\ldots$ का मान ज्ञात कीजिए।

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

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Similar Questions

$\frac{a + bx + cx^2}{e^x}$ के विस्तार में,$x^n$ का गुणांक क्या है?

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

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

$\sum_{n=1}^{\infty} \frac{2n}{(2n+1)!}$ का मान ज्ञात कीजिए।

$\frac{2\frac{1}{2}}{1!} + \frac{3\frac{1}{2}}{2!} + \frac{4\frac{1}{2}}{3!} + \frac{5\frac{1}{2}}{4!} + \dots \infty$ का मान क्या है?

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