Solve for r_1, r_2, L, V_1, V
r_{1}=\frac{V_{1}r_{2}}{V}\text{, }r_{2}\neq 0\text{, }L=\frac{r_{2}\left(V+V_{1}\right)}{V}\text{, }V_{1}\neq -V\text{, }V\neq 0
r_{1}=-r_{2}\text{, }r_{2}\neq 0\text{, }L=0\text{, }V_{1}\neq 0\text{, }V=-V_{1}
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