$\mathrm{n}_{\mathrm{e}}=\mathrm{n}_{\mathrm{h}}$

$n_h \gg n_e$

$\mathrm{n}_{\mathrm{h}} \ll \mathrm{n}_{\mathrm{e}}$

$\mathrm{n}_{\mathrm{h}}=\mathrm{n}_{\mathrm{e}}=0$

$\quad \mathrm{Y}=\overline{\mathrm{A}} \cdot(\overline{\mathrm{B}+\mathrm{C}})$

$\mathrm{Y}=(\overline{\mathrm{A} \cdot \mathrm{B}})+(\overline{\mathrm{B} \cdot \mathrm{C}})$

$ \mathrm{Y}=(\overline{\mathrm{A}+\mathrm{B}}) \cdot(\overline{\mathrm{B}+\mathrm{C}})$

$Y=(A+B) \cdot C$

increases, increases.

decreases, increases.

increases, decreases.

decreases, decreases.

$\beta \frac{r}{R_L}, \beta^2 \frac{r}{R_L}$

$\beta \frac{\mathrm{r}}{\mathrm{R}_{\mathrm{L}}}, \beta\left(\frac{\mathrm{r}}{\mathrm{R}_{\mathrm{L}}}\right)^2$

$\beta \frac{R_L}{r}, \beta^2 \frac{R_L}{r}$

$\beta \frac{R_L}{r}, \beta\left(\frac{R_L}{r}\right)^2$