1.

( int frac{dx}{x(x^2+1)} ) equals ______

A. (log|x| frac{1}{2} log(x^2+1) ) + C
B. (log|x| + frac{1}{2} log(x^2+1) ) + C
C. (log|x| + frac{1}{2} log(x^2+1) ) + C
D. ( frac{1}{2} log|x| + log(x^2+1) ) + C
Answer» B. (log|x| + frac{1}{2} log(x^2+1) ) + C


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