\(U=U_1+U_{23}=I_1\cdot R_1+I_1\cdot R_{23}=0,4\cdot14+0,4\cdot6=8\left(V\right)\)
\(U_2=U_3=U_{23}=U-U_1=8-5,6=2,4\left(V\right)\)
a) \(I_2=\dfrac{U_2}{R_2}=\dfrac{2,4}{8}=0,3A\)
\(I_3=\dfrac{U_3}{R_3}=0,1A\)
b) \(U_1=5,6\left(V\right)\), \(U_2=U_3=2,4\left(V\right)\), \(U=8\left(V\right)\) (đã tính)