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Homework Statement
Problem 2.9
Solve the integral:
\begin{equation}
\int \dddot \int dx_{1}dx_{2}\dddot dx_{N}
\end{equation}
where
\begin{equation}
0 \geq \sum_{i=1}^{N}x_{i} \leq R\]
\end{equation}
Homework Equations
The Attempt at a Solution
My issue is not really this problem but the general how-to. Pathria, it seems, does not like explaining the how and the why and instead thinks that a single example in Appendix C suffices. My attempt at a solution includes defining
\begin{equation}
x_{i} = u_{i}^{2}
\end{equation}
in order to get the hypervolume defined on a sphere as the condition becomes
\begin{equation}
0 \geq \sum_{i=1}^{N}u_{i}^{2} \leq R
\end{equation}
this is it however since the general theory is not explained. I have never felt so lost before...if anyone could point me to a good resource(I have yet to find any example or explanation online) or could give me a push in the right direction, it would be appreciated.
