यदि $\frac{x+1}{(x-1)^2(x^2+1)}=\frac{A}{x-1}+\frac{B}{(x-1)^2}+\frac{Cx+D}{x^2+1}$ है,तो $\sqrt{3A^2+4D^2+5C^2+B^2}=$

  • A
    $\frac{3}{2}$
  • B
    $\frac{1}{2}$
  • C
    $1$
  • D
    $2$

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