Question

Треба знайти R загальне

Answer 1

R*=(R2*R3*R4)/( R2*R3+ R3*R4+ R2*R4)=3*3*3/(9+9+9)=1
R**=R1+R*=3+1=4
R=R5*R**/(R5+R**)=3*4/(3+4)=12/7Ом