신호흐름선도의 전달함수 \(T(s) = \dfrac{C(s)}{R(s)}\) 로 옳은 것은? (전향경로 \(G_1 G_2 G_3\), 루프 이득 \(-G_2 G_3\) 과 \(-G_1 G_2 G_4\) 를 가진다.)

- 1\(\dfrac{G_1 G_2 G_3}{1 - G_2 G_3 + G_1 G_2 G_4}\)
- 2\(\dfrac{G_1 G_2 G_3}{1 + G_1 G_2 G_4 + G_2 G_3}\)
- 3\(\dfrac{G_1 G_2 G_3}{1 + G_1 G_3 - G_1 G_2 G_4}\)
- 4\(\dfrac{G_1 G_2 G_3}{1 - G_1 G_3 - G_1 G_2 G_4}\)
꿈라CBT