$x$ की बढ़ती घातों में $\frac{x - 4}{x^2 - 5x + 6}$ के प्रसार में $x^n$ का गुणांक ज्ञात कीजिए।

  • A
    $\frac{-1}{2^n} - \frac{1}{3^{n+1}}$
  • B
    $\frac{1}{2^n} - \frac{1}{3^{n-1}}$
  • C
    $\frac{-1}{2^n} + \frac{1}{3^{n+1}}$
  • D
    $\frac{-1}{2^n} + \frac{1}{3^{n-1}}$

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