Relation between alpha and beta of a transistor

1. A.
   $\beta = \frac{\alpha}{1 + \alpha}$
2. B.
   $\alpha = \frac{\beta}{1 - \alpha}$
3. C.
   $\beta = \frac{1}{1 - \alpha}$
4. D.
   $\alpha = \frac{\beta}{1 + \beta}$

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1. A.
   $\alpha = \frac{1 - \beta}{\beta}$
2. B.
   $\beta = \frac{\alpha}{1 - \alpha}$
3. C.
   $\alpha\beta = 1$
4. D.
   $\alpha = \frac{\beta}{1 - \beta}$

Tap an option to check your answer.