Ответ:
Объяснение:
1 / r234 = 1/R1 + 1/R2 +1/R3 = 1/10 + 1/15 + 1/30 = 6/30 = 1/5
r234 = 5 Ом
R = R1+r234 = 2+5 = 7 Ом
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Verified answer
Ответ:
Объяснение:
1 / r234 = 1/R1 + 1/R2 +1/R3 = 1/10 + 1/15 + 1/30 = 6/30 = 1/5
r234 = 5 Ом
R = R1+r234 = 2+5 = 7 Ом