「周波数応答」の版間の差分

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<math>\begin{array}{l l l}x_3(t) &=& \theta(t)\\x_1(t) &=& \frac{d \theta(t)}{dt}\end{array}</math>
<math>
\begin{array}{l l l}
  x_3(t) &=& \theta(t)\\
  x_1(t) &=& \frac{d \theta(t)}{dt}
\end{array}
</math>