For a transistor, $\frac{1}{\alpha_{D C}}-\frac{1}{\beta_{D C}}$ is equal to $\left[\alpha_{D C}\right.$ and…
For a transistor, $\frac{1}{\alpha_{D C}}-\frac{1}{\beta_{D C}}$ is equal to $\left[\alpha_{D C}\right.$ and $\beta_{D C}$ are current amplification factors]