$|x| < 1$ के लिए, $\frac{2}{(1-x)(2-x)}$ के अनंत श्रेणी विस्तार में $x^{3}$ का गुणांक क्या है?

  • A
    $-\frac{1}{16}$
  • B
    $\frac{15}{8}$
  • C
    $-\frac{1}{8}$
  • D
    $\frac{15}{16}$

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