Odpowiedź:
1/R23 = 1/R2 + 1/R3 = 1/1 +1/1 = 2/1 [1/Ω]
R23 = 1/2 Ω
Rz = R1 +R23 +R4 = 1+0,5+1 = 2,5 Ω
Rz = 2,5 Ω
