$3^x$ के विस्तार में $x^3$ का गुणांक क्या है?

  • A
    $\frac{3^3}{6}$
  • B
    $\frac{(\log 3)^3}{3}$
  • C
    $\frac{\log(3^3)}{6}$
  • D
    $\frac{(\log 3)^3}{6}$

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$\frac{1-2x-x^2}{e^{-x}}$ के विस्तार में $x^k$ का गुणांक क्या है?

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

$1 - \log 2 + \frac{(\log 2)^2}{2!} - \frac{(\log 2)^3}{3!} + \dots$ का मान है

$1 + \frac{a - bx}{1!} + \frac{(a - bx)^2}{2!} + \frac{(a - bx)^3}{3!} + \dots \infty = $

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