1.

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

A. ( frac{3}{5}log|x+2| + frac{1}{5}log|x^2+1|+ frac{1}{5} tan^{-1}x+5C )
B. ( frac{3}{5}log|x+2| + frac{1}{5}log|x^2+1|+ frac{1}{6} tan^{-1}x+C )
C. ( frac{3}{5}log|x+2| + frac{1}{6}log|x^2+1|+ frac{1}{6} tan^{-1}x+C )
D. ( frac{3}{5}log|x+2| + frac{1}{5}log|x^2+1|+ frac{1}{5} tan^{-1}x+C )
Answer» E.


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