$\frac{1-2x}{(2x+1)(2-x)}$ के विस्तार में $x^3$ का गुणांक क्या है?

  • A
    $-\frac{509}{80}$
  • B
    $\frac{509}{80}$
  • C
    $-\frac{103}{16}$
  • D
    $\frac{103}{16}$

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