図のブロック線図の伝達関数(Y/X)はどれか。
1: $ \frac {G_{1}}{1+G_{1}+G_{1}G_{2}}$
2: $ \frac {G_{2}}{1+G_{1}+G_{1}G_{2}}$
3: $ \frac {G_{1}}{1+G_{2}+G_{1}G_{2}}$
4: $ \frac {G_{2}}{1+G_{2}+G_{1}G_{2}}$
5: $\frac {G_{1}G_{2}}{1+G_{1}+G,G_{2}}$
図の出力Xはどれか。
1: $\overline {A}\cdot \overline {B}+A\cdot B $
2: $\overline {A}\cdot\ B+A\cdot\ \overline {B}$
3: $\left( A+B\right) \cdot \left( A+\overline {B}\right) $
4: $\left( A+B\right) \cdot \left( A+\overline {B}\right) $
5: $\overline {A}\cdot \left( A+B\right) +B\cdot \left( \overline {A}\cdot \overline {B}\right) $