यदि $\frac{x^3+3}{(x-3)^3}=a+\frac{b}{x-3}+\frac{c}{(x-3)^2}+\frac{d}{(x-3)^3}$ है, तो $(a+d)-(b+c)=$

  • A
    $49$
  • B
    $15$
  • C
    $-30$
  • D
    $-5$

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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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