Объяснение:
1)
R = (R1/2) +R3 = (6/2) + 6 = 9 Ом
2
R = (R1+R2) * (R3+R4) / (R1+R2+R3+R4) = (4+12) * (5+15) / (4+12+5+15) == 8.9 Ом
Объяснение:
1)
R = (R1/2) +R3 = (6/2) + 6 = 9 Ом
2
R = (R1+R2) * (R3+R4) / (R1+R2+R3+R4) = (4+12) * (5+15) / (4+12+5+15) == 8.9 Ом