N_{1} = \frac{U^{2} R_{1}}{(R_{1} + R_{l})^{2}} j a N_{2} = \frac{U^{2} R_{2}}{(R_{2} + R_{l})^{2}}

${N_1= \frac{U^2R_1}{(R_1 + R_l)^2} \quad ja\quad N_2 = \frac{U^2R_2}{(R_2 + R_l)^2}}$

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