1. Jun 27, 2016 #1

   Guest432

   

   The answer here shows the answer as being
   
   
   but my limited knowledge of integrals begs me to asks where did the z go?

    

   Guest432, Jun 27, 2016
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3. Jun 27, 2016 #2

   fresh_42

   

   Insights Author

   2017 Award

   Staff: Mentor

   If ##F(z)## is the antiderivative of ##f(z)##, i.e. ##F'(z) = \frac{d}{dz} F(z) = f(z)## then ##\int_0^R f(z)dz = F(R) - F(0)##.
   Since ##F(0) = 0## in your example, only ##F(R)## is left. It is called the fundamental theorem of calculus.

    

   fresh_42, Jun 27, 2016
4. Jun 27, 2016 #3

   BiGyElLoWhAt

   

   Gold Member

   Well, in definite integrals, you have a constant as the answer, not a function of the variables.

    

   BiGyElLoWhAt, Jun 27, 2016

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