R2,3=1/2+1/4=0,75
R1,2,3=1+0,75=1,75
R1,2,3,4=1/1,75+1/1,5 = 3,25/2,625
I=3/(3,25/2,625)=7,875/325=0,315/0,13
R2,3=1/2+1/4=0,75
R1,2,3=1+0,75=1,75
R1,2,3,4=1/1,75+1/1,5 = 3,25/2,625
I=3/(3,25/2,625)=7,875/325=0,315/0,13