$(2+3x)e^{-x}$ के विस्तार में $x^{10}$ का गुणांक क्या है?

  • A
    $\frac{-26}{10!}$
  • B
    $\frac{-28}{10!}$
  • C
    $\frac{-30}{10!}$
  • D
    $\frac{-32}{10!}$

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$(1 + x + x^2)e^{-x}$ के विस्तार में $x^2$ का गुणांक है

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