1/Roб= 1/R1+1/R2+1/R3
1/Rоб= 1/540+1/270+1/175 = (47250+94500+145800)/25515000
Rоб=25515000/287550=88,73 Ом
1/Roб= 1/R1+1/R2+1/R3
1/Rоб= 1/540+1/270+1/175 = (47250+94500+145800)/25515000
Rоб=25515000/287550=88,73 Ом