\[\text{f}_{\alpha}=\frac{1+\text{h}_{\text{fe}}}{2 \pi r_{\text{b}^{\prime} \text{e}}\left(\text{C}_{\text{C}}+\text{C}_{\text{e}}\right)}=\left(1+\text{h}_{\text{fe}}\right) \text{f}_{\beta}=(1+\beta) \text{f}_{\beta}\]
\[\text{f}_{\alpha}=\frac{1+\text{h}_{\text{fe}}}{2 \pi r_{\text{b}^{\prime} \text{e}}\left(\text{C}_{\text{C}}+\text{C}_{\text{e}}\right)}=\left(1+\text{h}_{\text{fe}}\right) \text{f}_{\beta}=(1+\beta) \text{f}_{\beta}\]
\[\text{f}_{\alpha}=\frac{1+\text{h}_{\text{fe}}}{2 \pi r_{\text{b}^{\prime} \text{e}}\left(\text{C}_{\text{C}}+\text{C}_{\text{e}}\right)}=\left(1+\text{h}_{\text{fe}}\right) \text{f}_{\beta}=(1+\beta) \text{f}_{\beta}\]