Integrating Factor Differential Equation

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SUMMARY

The forum discussion focuses on solving the integral of the function \(\int \frac{x-2}{x(x-1)}dx\) using partial fraction decomposition. The user attempts to break down the integral into simpler components but struggles with the resulting expressions, particularly \(\int (x^2 - x)^{-1}dx\). The solution involves recognizing that applying partial fractions simplifies the integral, allowing for easier computation. Ultimately, the user is advised to utilize the method of partial fraction decomposition effectively to resolve the integral.

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Deathfish
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Homework Statement



e∫^P(x)

∫[itex]\frac{x-2}{x(x-1)}[/itex]dx

The Attempt at a Solution



so i split it into

∫[itex]\frac{x-2}{x(x-1)}[/itex]dx
= ∫[itex]\frac{2x-1}{x^2-x}[/itex]dx - ∫[itex]\frac{x+1}{x^2-x}[/itex]dx

= ln(x2-x) - ∫[itex]\frac{x}{x^2-x}[/itex] - ∫(x2-x)-1

= ln(x2-x) - ln(x-1) - ∫(x2-x)-1

ok. having problems working out ∫(x2-x)-1dx
tried many ways but i keep ending up with the original integral.

u=x-1 --> du=-x-2
dv= (x-1)-1dx --> v=ln(x-1)

gives me ([itex]\frac{1}{x}[/itex])ln(x-1) + ∫[itex]\frac{ln(x-1)}{x^2}[/itex]dx

when i work this out

∫[itex]\frac{ln(x-1)}{x^2}[/itex]dx

u=ln(x-1) --> du=[itex]\frac{1}{x-1}[/itex]
dv=x-2dx --> v=-x-1

i get

∫[itex]\frac{ln(x-1)}{x^2}[/itex]dx = [itex]\frac{-ln(x-1)}{x}[/itex] + ∫(x2-x)-1

which is the same integral and above and i get no solution.
Need help...
 
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Deathfish said:

Homework Statement



e∫^P(x)

∫[itex]\frac{x-2}{x(x-1)}[/itex]dx

...

Need help...
Use partial fraction decomposition on [itex]\displaystyle\frac{x-2}{x(x-1)}\,.[/itex]
 

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