1) R1,2=R1 + R2 - послед.
2) R3,3,3=3R3 - послед.
3) R1,2,3=(R1+R2)*3R3 / (R1+R2+3R3) - паралл.
5) Roбщ=(R1+R2)*3R3/(R1+R2+3R3) + R4 + R5 - послед.
1) R1,2=R1 + R2 - послед.
2) R3,3,3=3R3 - послед.
3) R1,2,3=(R1+R2)*3R3 / (R1+R2+3R3) - паралл.
5) Roбщ=(R1+R2)*3R3/(R1+R2+3R3) + R4 + R5 - послед.