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Verified answer

Ответ:

4,775 Ом

Объяснение:

R12=R1+R2=3+3=6 Ом

R34=R3+R4=1+5=6 Ом

R1234=6/2=3 Ом

R56=12/2=6 Ом

R123456=R1234*R56/(R1234+R56)=3*6/(3+6)=2 Ом

R89=R8*R9/(R8+R9)=3*5/(3+5)=1.875 Ом

R=R123456 + R7 + R89=2+0.9+1.875=4.775 Ом

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