# Electric Field due to a Point Charge

## Homework Statement

Looking at the picture I have attached the problem is very straight forward. In the denominator of the equations I have posted the teacher uses 2$\Pi$ but the book uses 4$\Pi$. Can someone please explain to me why is that.

Book's equation:

Teacher's Soln:

## The Attempt at a Solution

Please refer to attached pictures.

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## Answers and Replies

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I was finally able to solve my problem. By the way from the two y points there is infinite line of charge in the z-axis. Here is my answer:

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