यदि $\int \tan^{-1} x \, dx = Ax \tan^{-1} x + B \log(1 + x^2) + C$ है, तो $A + B = \_\_\_\_$

  • A
    $-1$
  • B
    $1/2$
  • C
    $1$
  • D
    $-1/2$

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