MCQ
$\frac{ d }{ dx } \log \left(\frac{1}{ x }\right)=\ldots \ldots . .( x >0)$
- A$-\frac{1}{x^2}$
- B$\frac{1}{x^2}$
- ✓$-\frac{1}{x}$
- D$-\frac{2}{x^2}$
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