$\int \frac{dx}{(x^2+1)(x^2+4)} = $

  • A
    $\frac{1}{3} \tan^{-1} x + \frac{1}{6} \tan^{-1}(\frac{x}{2}) + C$
  • B
    $\frac{1}{3} \tan^{-1} x - \frac{1}{3} \tan^{-1}(\frac{x}{2}) + C$
  • C
    $\frac{1}{3} \tan^{-1} x + \frac{1}{3} \tan^{-1}(\frac{x}{2}) + C$
  • D
    $\frac{1}{3} \tan^{-1} x - \frac{1}{6} \tan^{-1}(\frac{x}{2}) + C$

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यदि $\int \frac{x+3}{(x-1)^2(2 x-1)} d x=\frac{A}{x-1}+B \log (2 x-1)+C \log (x-1)+K$ है, तो $A+B+C=$

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