V = \frac{I_{max} - I_{min}}{I_{max} + I_{min}} = \frac{2 R}{1 + R^{2}}

${V = \frac{I_\text{max} - I_\text{min}}{I_\text{max} + I_\text{min}} = \frac{2R}{1 + R^2}}$

Error