$\int \frac{d x}{(x+100) \sqrt{x+99}}=f(x)+c \Rightarrow f(x)$

  • A
    $2(x+100)^{1 / 2}$
  • B
    $3(x+100)^{1 / 2}$
  • C
    $2 \tan ^{-1}(\sqrt{x+99})$
  • D
    $2 \tan ^{-1}(\sqrt{x+100})$

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