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The electric fiel due to elementary ring at the point P is dE = [

**2∏rσdrx**]/[

**4∏epsilon zero (x^2 +r^2)^(3/2)**

]

To find the total E due to disc is given by

∏σx/4∏ε

**∫**(2rdr)/(x2 + r2)3/2

I am stuck with the calculus done here to arrive at the solution. Please help me.

Thank You!

Vinzie