Multipole Expansion - Electrostatic Case

[golfingboy07]

Im having a little problem with this question
Not sure where to start but I believe that a 3D taylor series expansion might be useful.

Please could someone urgently help me out as it is due in a few hours!

Thanks for your time.

GM

[quasar987]

The thing is that when you attach a file to your post, it must be approved by the administrators or moderators of the forum before people can download the file. Next time you have an urgent question, you would get faster responses by typing the question!