differentiation

Question: $\frac{d}{{dx}}\left[ {\log \left( {x + \frac{1}{x}} \right)} \right] = $



1) $\left( {x + \frac{1}{x}} \right)$
2) $\frac{{\left( {1 + \frac{1}{{{x^2}}}} \right)}}{{\left( {1 + \frac{1}{x}} \right)}}$
3) $\frac{{\left( {1 - \frac{1}{{{x^2}}}} \right)}}{{\left( {x + \frac{1}{x}} \right)}}$
4) $\left( {1 + \frac{1}{x}} \right)$
Solution: Explanation: Explanation
standard-differentiation

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