A.x=ι-ι4/(40R2I02)+ι9/(3456R4I04)… B.x=ι-ι5/(40R2I02)+ι9/(3456R4I04)… C.x=ι-ι3/(40R2I02)+ι9/(3456R4I04)… D.x=ι-ι2/(40R2I02)+ι9/(3456R4I04)…
A.ι×(1-ι4/(πR2I02)) B.ι×(1-ι3/(90R2I02)) C.ι×(1-ι5/(90R2I02)) D.ι×(1-ι4/(90R2I02))