यदि $\int \frac{x^{49} \tan ^{-1}(x^{50})}{1+x^{100}} d x=k(\tan ^{-1}(x^{50}))^2+c$ है, तो $k=$

  • A
    $\frac{-1}{100}$
  • B
    $\frac{1}{50}$
  • C
    $\frac{-1}{50}$
  • D
    $\frac{1}{100}$

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