I = E/ R+r
1/R = 1/R1 + 1/R2 + 1/R3 = 1/1.2 + 1/1.2 + 1/3 = 2/1.2 + 1/3 = 1/0.6 + 1/3 = 1.67 + 0.33 = 2
R = 1/2 = 0.5
I = 1.44 / (0.6+0.5) = 1.3A
I = E/ R+r
1/R = 1/R1 + 1/R2 + 1/R3 = 1/1.2 + 1/1.2 + 1/3 = 2/1.2 + 1/3 = 1/0.6 + 1/3 = 1.67 + 0.33 = 2
R = 1/2 = 0.5
I = 1.44 / (0.6+0.5) = 1.3A