Explanation of example. How do I calculate point charge and electrical filed of point?

Discussion in 'Homework Help' started by thexy, Jan 27, 2016.

  1. thexy

    Thread Starter Member

    Dec 13, 2015
    126
    0
    Hello everyone. Here is one example and it's solution, if someone could explain me how they got this things underlined with red color I would be really thankful.
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