1.

( int frac{dx}{(x^2-9)} ) equals ______

A. ( frac{1}{6} log frac{x+3}{x-3} ) + C
B. ( frac{1}{6} log frac{x-3}{x+3} ) + C
C. ( frac{1}{5} log frac{x+3}{x-3} ) + C
D. ( frac{1}{3} log frac{x+3}{x-3} ) + C
Answer» C. ( frac{1}{5} log frac{x+3}{x-3} ) + C


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