व्यंजक $\frac{3x}{(x - 2)(x + 1)}$ के प्रसार में $x^4$ का गुणांक क्या है?

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

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