Integral of polynomial to some power

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Discussion Overview

The discussion centers on the integration of a polynomial raised to a non-integer power, exploring the general form of such integrals and potential methods for evaluation. The scope includes theoretical considerations and mathematical reasoning.

Discussion Character

  • Exploratory, Technical explanation, Mathematical reasoning

Main Points Raised

  • One participant inquires about the general method for integrating a polynomial raised to a real power, suggesting a connection to Newton's binomial theorem.
  • Another participant asserts that there is no simple method for performing such integrals.
  • A third participant expresses agreement with the difficulty of the problem, indicating a sense of disappointment regarding the lack of straightforward solutions.
  • A later reply mentions specific cases, such as the integral of a fourth-degree polynomial leading to elliptic integrals and the integral of a product of terms resulting in the Beta function.

Areas of Agreement / Disagreement

Participants generally agree on the complexity of integrating polynomials to non-integer powers, with no consensus on a straightforward method. Multiple views on specific cases and approaches are presented.

Contextual Notes

The discussion highlights limitations in finding a general solution, with references to specific types of integrals that may not apply universally. The dependence on the nature of the polynomial and the power is acknowledged.

Who May Find This Useful

This discussion may be of interest to mathematicians, students studying calculus, and those exploring advanced integration techniques.

Wiemster
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Does anybody know in general how (if) one can perform the integral of a general polynomial to some, not necessarily integer, power? I.e.

[tex]\int \left(\Sigma_{i=0} ^n c_i x^i \right)^a dx[/tex]

with [itex]c_i[/itex] and [itex]a[/itex]arbitrary (real) numbers,

[tex]\int \left(1+x + x^2 + 2x^5 \right)^{1.7} dx[/tex].

Maybe what I'm looking for is some generalization of Newton's binomium?
 
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There is no simple way to do that.
 
I already thought it would be difficult, if not impossible. Too bad. Thanks anyway.
 
[itex]\int\sqrt{\text{fourth degree}}[/itex] = elliptic integral

[itex]\int_0^1 [x(1-x)]^a\,dx[/itex] = Beta function
 

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