Shortcuts for Solving Multiple Integrals: Is There a Faster Way?

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SUMMARY

The discussion focuses on finding efficient methods for solving multiple integrals, specifically addressing the challenge of lengthy calculations. The user initially attempts to solve for $x_1$ while treating other variables as constants but finds the process cumbersome. A proposed alternative involves rewriting the integrand as $\displaystyle 1 - \frac{2\,x_5}{x_1+x_2+x_3+x_4+x_5}$, which simplifies the problem but still leads to complex logarithmic calculations. The goal is to identify a shortcut that reduces the solution time to 2-3 minutes.

PREREQUISITES
  • Understanding of multiple integrals and their properties
  • Familiarity with integration techniques, including integration by parts
  • Knowledge of algebraic manipulation of integrands
  • Basic proficiency in calculus
NEXT STEPS
  • Research advanced techniques for solving multiple integrals efficiently
  • Explore the method of substitution in integrals to simplify calculations
  • Learn about numerical integration methods for quick approximations
  • Investigate the use of software tools like Mathematica for integral solutions
USEFUL FOR

Students, mathematicians, and educators looking to enhance their skills in solving multiple integrals efficiently, particularly those seeking to reduce computation time in calculus problems.

DaalChawal
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I'm having a problem solving this, My approach is solving $x_1$ as a variable and rest as constants first and then going on further. But it is getting too lengthy. Is there any short method?
 
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Would it help writing the integrand as $\displaystyle \begin{align*} 1 - \frac{2\,x_5}{x_1+x_2+x_3+x_4+x_5} \end{align*}$?
 
Yes, it does help but after the first two steps log comes, and then using by parts it becomes quite lengthy. I was looking for a short approach so that this question can be solved in 2-3 minutes. Btw thanks for your help 🙂
 

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