Question

R2=4 Ом<br /> R3=6 Ом<br /> Rобщ=1,71 Ом<br /> U=12 В. <br /> ______________<br /> R1= ?

Answer 1

1/r1+1/r2+1/r3=1/rобщ
1/r1+1/4+1/6=1/1.71
1/r1=0.58-0.25-0.17=0.16
r1=6.25