Integral Calculation: Solving Complex Integrals with Unknown Constants

Click For Summary
SUMMARY

The integral calculation discussed involves the expression \int x \frac{dx}{\sqrt{(a^2+x^2)^3}}, where a is a real number. Participants noted that previous attempts with similar integrals, such as \int \frac{dx}{\sqrt{a^2+x^2}} and \int \frac{dx}{x(x^2+1)}, did not yield results. A successful approach suggested was the substitution u=x^2+a^2, which simplified the integral significantly, leading to a correct solution.

PREREQUISITES
  • Understanding of integral calculus
  • Familiarity with substitution methods in integration
  • Knowledge of handling square roots in integrals
  • Experience with solving integrals involving unknown constants
NEXT STEPS
  • Study advanced techniques for integral substitution
  • Explore integrals involving square roots and rational functions
  • Learn about integral convergence and divergence
  • Practice solving integrals with unknown parameters
USEFUL FOR

Students and educators in mathematics, particularly those focused on calculus, as well as anyone seeking to improve their skills in solving complex integrals with unknown constants.

kostas
Messages
6
Reaction score
0

Homework Statement


Calculate the integral:

\int x \frac{dx}{\sqrt{(a^2+x^2)^3}}

where a\in R

Homework Equations





The Attempt at a Solution


I solved "similar" integrals like \int \frac{dx}{\sqrt{a^2+x^2}}

and \int \frac{dx}{x(x^2+1)}

but none of the approaches I know (and used for the above) seem to work. Not sure how to start here. Any ideas?
 
Physics news on Phys.org
Just try substituting u=x^2+a^2. Your integral is even easier than the other two.
 
Yes, it was. I was making a silly mistake.

Thanks!
 

Similar threads

  • · Replies 105 ·
4
Replies
105
Views
7K
  • · Replies 22 ·
Replies
22
Views
3K
Replies
7
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 19 ·
Replies
19
Views
2K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K