I thought that I could do the point charge at the center of the sphere for each one and then the problem become trivial, but don't you have to take into account the radius the sphere?
So with the idea that the sphere becomes a point charge, you have two point charges, one positive, one...
Homework Statement
A conducting sphere of radius R carries a total charge of +Q. Its center is placed a distance 2R to the right of a grounded conducting plate. What is the potential at a general point in space outside the sphere and to the right of the plane? (Carry out to at least four...