Is There a General Formula for this Partial Fraction Function?

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Discussion Overview

The discussion revolves around the formulation of a general expression for partial fractions of a specific function involving multiple linear factors. The focus is on the mathematical representation and the independence of variables in the context of partial fraction decomposition.

Discussion Character

  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant inquires about a general formula for the partial fraction of the function \(\frac{1}{(ax_1+1)(ax_2+1)\cdots (ax_L+1)}\), noting complexity increases with larger \(L\).
  • Another participant suggests expressing the function as a sum of fractions \(\frac{c_1}{ax_1+1}+\frac{c_2}{ax_2+1}+\cdots+\frac{c_L}{ax_L+1}\) and questions the independence of the constants \(c\) from the variables \(a\) or \(x\).
  • There is clarification that \(a\) is treated as a constant while \(x\) represents the variables, leading to the conclusion that the constants \(c\) will depend on the values of \(x\).
  • A later reply confirms the understanding that \(a\) is the variable and \(x\) are constants, indicating that a general solution expression has been obtained.

Areas of Agreement / Disagreement

Participants generally agree on the roles of the variables and constants in the expression, but the discussion does not reach a consensus on a specific general formula for all \(L\). The complexity of the problem remains acknowledged.

Contextual Notes

The discussion does not resolve the general formula for arbitrary \(L\) and lacks specific mathematical steps or assumptions that may affect the formulation.

EngWiPy
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Hello,

Is there any general formula for the partial fraction of the following function:

[tex]\frac{1}{(ax_1+1)(ax_2+1)\cdots (ax_L+1)}[/tex]

I can work for L=3, but it get involved for larger L!

Thanks in advance
 
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Ok... from what I've understood, you want write

[tex]\frac{1}{(ax_1+1)(ax_2+1)\cdots(ax_L+1)}[/tex]

as

[tex]\frac{c_1}{ax_1+1}+\frac{c_2}{ax_2+1}+\cdots+\frac{c_L}{ax_L+1}[/tex]

where the c's are constants. My question is, what is the variable the c's must be independent of? a or x?
 
coelho said:
Ok... from what I've understood, you want write

[tex]\frac{1}{(ax_1+1)(ax_2+1)\cdots(ax_L+1)}[/tex]

as

[tex]\frac{c_1}{ax_1+1}+\frac{c_2}{ax_2+1}+\cdots+\frac{c_L}{ax_L+1}[/tex]

where the c's are constants. My question is, what is the variable the c's must be independent of? a or x?

a is a constant, and x's are the variables.
 
coelho said:
Ok... from what I've understood, you want write

[tex]\frac{1}{(ax_1+1)(ax_2+1)\cdots(ax_L+1)}[/tex]

as

[tex]\frac{c_1}{ax_1+1}+\frac{c_2}{ax_2+1}+\cdots+\frac{c_L}{ax_L+1}[/tex]

where the c's are constants. My question is, what is the variable the c's must be independent of? a or x?

Problems involving partial fractions usually have one variable and many constants. From the appearance of your expression, I assume a is the variable and the x's are constants. In that case the c's will be determined by the x's.
 
mathman said:
Problems involving partial fractions usually have one variable and many constants. From the appearance of your expression, I assume a is the variable and the x's are constants. In that case the c's will be determined by the x's.

yes, right. a is the variable and x's are the constants. I got the general solution expression.

Thanks
 

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