यदि $\frac{1}{x(x + 1)(x + 2)...(x + n)} = \frac{A_0}{x} + \frac{A_1}{x + 1} + \frac{A_2}{x + 2} + .... + \frac{A_n}{x + n}$ है,तो $A_r = $

  • A
    $\frac{r!(-1)^r}{(n - r)!}$
  • B
    $\frac{(-1)^r}{r!(n - r)!}$
  • C
    $\frac{1}{r!(n - r)!}$
  • D
    इनमें से कोई नहीं

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यदि $\frac{x^3}{(2 x-1)(x+2)(x-3)} = A + \frac{B}{2 x-1} + \frac{C}{x+2} + \frac{D}{x-3}$ है,तो $A$ का मान ज्ञात कीजिए।

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