A.16 B.8 C.4 D.2
A.φ1+φ2 B.φ1-φ2 C.arctan(X1+X2)/(R1+R2) D.arctan(X1-X2)/(R1+R2)
A.Z= B.Z=R+jωC C.Z=R+1/jωC D.Z=R-jωC