Olga Basarigina Ответ. R12=(R1*R2)/(R1+R2); R34=(R3*R4)/(R3+R4); R=R12+R34; J=U/R; U12=J*R12; U34=J*R34; J1=U12/R1; J2=U12/R2; J3=U34/R3; J4=U34/R4; U=18; R1=1,6; R2=4; R3=6; R4=12;