数学试题讲解

设

I = \int \frac{x d x}{a + b x^{2}}

, 则

I =

\frac{1}{2} \ln | a + b x^{2} | + C

. B.

\frac{b}{2} \ln | a + b x^{2} | + C

. C.

\frac{1}{b} \ln | a + b x^{2} | + C

. D.

\frac{1}{2 b} \ln | a + b x^{2} | + C