R(1-2-3)=R1+R2+R3=5+4+3=12 OM
R'=R(1-2-3)|| R4=R(1-2-3)*R4/(R(1-2-3)+R4)=12*6/(12+6)=4 OM
R=R'+R5=4+2=6 OM
I=U(AB)/R=36/6=6 A
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R(1-2-3)=R1+R2+R3=5+4+3=12 OM
R'=R(1-2-3)|| R4=R(1-2-3)*R4/(R(1-2-3)+R4)=12*6/(12+6)=4 OM
R=R'+R5=4+2=6 OM
I=U(AB)/R=36/6=6 A