図のシステム伝達関数はどれか。
1: $\frac {1}{G\left( s\right) H\left( s\right) }$
2: $\frac {G\left( s\right) }{1-G\left( s\right) H\left( s\right) }$
3: $\frac {G\left( s\right) }{1+G\left( s\right) H\left( s\right) }$
4: $\frac {G\left( s\right) H\left( s\right) }{1-G\left( s\right) H\left( s\right) }$
5: $\frac {G\left( s\right) H\left( s\right) }{1+G\left( s\right) H\left( s\right) }$
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: $\frac {G_{1}G_{2}}{1+G_{1}+G,G_{2}}$
図の出力として正しいのはどれか。
1: $X=\overline {A}\cdot \overline {B}+A\cdot B$
2: $X=\overline {A}\cdot B+A\cdot \overline {B}$
3: $X=\left( A+B\right) \cdot \left( A+\overline {B}\right) $
4: $X=\left( \overline {A}+B\right) \cdot \left( A+\overline {B}\right)$
5: $X=\overline {A}\cdot \left( A+B\right) +B\left( \overline {A}+\overline {B}\right)$