$\frac{1^2 \cdot 2}{1!} + \frac{2^2 \cdot 3}{2!} + \frac{3^2 \cdot 4}{3!} + \dots \infty = $ ($e$ में)

  • A
    $6$
  • B
    $7$
  • C
    $8$
  • D
    $9$

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Similar Questions

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

श्रेणी $\frac{1}{2!} - \frac{1}{3!} + \frac{1}{4!} - \dots$ का अनंत पदों तक योग ज्ञात कीजिए।

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

$(e^x - 1)^2$ के विस्तार में $x^4$ का गुणांक क्या होगा?

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

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