MCQ
$\frac{\text{x}}{\text{dx}}\int\text{f(x)}\text{dx}$ is equal to:
- A$f\ '(x)$
- ✓$f(x)$
- C$f\ '(x\ ’)$
- D$f(x) + c$
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$(I)$ $Trace(\mathrm{R})=0$
$(II) $If $trace(\operatorname{adj}(\operatorname{adj}(\mathrm{R}))=0$, then $R$ has exactly one non-zero entry.