differentiation

Question: $\frac{d}{{dx}}{\left( {\sqrt x + \frac{1}{{\sqrt x }}} \right)^2} = $



1) $1 - \frac{1}{{{x^2}}}$
2) $1 + \frac{1}{{{x^2}}}$
3) $1 - \frac{1}{{2x}}$
4) None of these
Solution: Explanation: Explanation
standard-differentiation

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