R=R1R2R3R4/(R2R3R4+R1R3R4+R1R2R4+R1R2R3)=2×4×8×16/(4×8×16+2×8×16+2×4×16+2×4×8)=1024/(512+256+128+64)=1.067 Ом
R=R1R2R3R4/(R2R3R4+R1R3R4+R1R2R4+R1R2R3)=2×4×8×16/(4×8×16+2×8×16+2×4×16+2×4×8)=1024/(512+256+128+64)=1.067 Ом