Editor
$\int_{1}^{2}\frac{x}{x^{2}+2}dx$ is given by:
Difficulty: Easy
A: 
$\sqrt{2}$
B: 
$\frac{1}{\sqrt{2}}$
C: 
$ln\sqrt{2}$
D: 
$\frac{1}{ln\sqrt{2}}$
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