For the dipole in Ex. 3.10, expand and use this to determine the quadrupole and octopol...

For the dipole in Ex. 3.10, expand and use this to determine the quadrupole and octopole terms in the potential.

Reference 3.10

A (physical) electric dipole consists of two equal and opposite charges (±q) separated by a distance d. Find the approximate potential at points far from the dipole.