i1=r1i_{1}=r_{1}i1=r1
r1=r2r_{1}=r_{2}r1=r2
r1=r2=(A+δm)/2r_{1}=r_{2}=\left(A+\delta_{m}\right) / 2r1=r2=(A+δm)/2
i1=i2=A/2i_{1}=i_{2}=A / 2i1=i2=A/2