Here's my reasoning.
Each individual field is the same on the point P E1=E2=Kq/d^2
But I know the Y components of each of the fields cancel out. The resultant field is the addition of the X components of each field (which are the same).
E=2E1*cos(w)
where w is the angle between the horizontal...
Well, I'm curious since this problem wasn't finally solved. I'm trying to solve it myself but I have a problem.
Ok, so my approach, as suggested, was doing it with energy and work. Work is the difference between the initial and final potetial energy of te system, right?.
So, at the beggining...