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Having trouble understanding this integration

  1. Dec 19, 2013 #1
    I am reading through this physics book and have trouble understanding how they integrated one of the problems the conditions are

    Conditions: // ignoring the constant for simplicity

    r = √(x^2 + R^2)
    sin(θ) = R/√(x^2 + R^2)


    ∫ R/(x^2 + R^2)^3/2 dx

    and the result is: x/R(x^2 + R^2)^1/2

    Could someone please explain to me how the integration part was done in more detail?
    Last edited: Dec 19, 2013
  2. jcsd
  3. Dec 19, 2013 #2
    Nevermind, I had to use a substitution x = R tan (theta)
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