यदि $\frac{x^2}{(x^2+2)(x^4-1)} = \frac{A}{x^2-1} + \frac{B}{x^2+1} + \frac{C}{x^2+2}$ है,तो $A+B-C=$

  • A
    $0$
  • B
    $\frac{4}{3}$
  • C
    $\frac{3}{4}$
  • D
    $2$

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यदि $F_1$ और $F_2$ वास्तविक गुणांकों के साथ $x^4+x^2+1$ के अपरिमेय गुणनखंड हैं और $\frac{x^3-2x^2+3x-4}{x^4+x^2+1}=\frac{Ax+B}{F_1}+\frac{Cx+D}{F_2}$ है,तो $A+B+C+D=$

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