数学试题讲解

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设

I = \int \frac{\arctan \sqrt{x}}{\sqrt{x} (1 + x)} d x

, 则

I =

- (\arctan \sqrt{x})^{2} + C

. B.

\arctan \sqrt{x} + C

(\arctan \sqrt{x})^{2} + C

. D.

- \sqrt{\arctan x} + C