d ( \frac { R } { 1 + 2 \pi f R C } ) / d f = 0
Ebatzi: C (complex solution)
C\in \mathrm{C}
d\neq 0\text{ and }\left(R=0\text{ or }f=0\right)
Ebatzi: R (complex solution)
\left\{\begin{matrix}R=0\text{, }&d\neq 0\\R\in \mathrm{C}\text{, }&d\neq 0\text{ and }f=0\end{matrix}\right.
Ebatzi: C
C\in \mathrm{R}
d\neq 0\text{ and }\left(R=0\text{ or }f=0\right)
Ebatzi: R
\left\{\begin{matrix}R=0\text{, }&d\neq 0\\R\in \mathrm{R}\text{, }&d\neq 0\text{ and }f=0\end{matrix}\right.
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