Integration of irrational function

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SUMMARY

The integral \(\int \frac{1}{(x-2)^3\sqrt{3x^2-8x+5}}\mathrm{d}x\) presents challenges in finding an effective substitution. A proposed substitution is \(x-2=\frac{1}{u}\), leading to a transformed integral involving \(u\). However, further simplification is necessary, particularly by factoring the expression \(3x^2-8x+5\) to facilitate the integration process. This discussion emphasizes the importance of strategic substitutions in solving complex integrals.

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gruba
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Homework Statement


Find the integral \int \frac{1}{(x-2)^3\sqrt{3x^2-8x+5}}\mathrm dx

2. The attempt at a solution
I can't find a useful substitution to solve this integral.
I tried x-2=\frac{1}{u},x=\frac{1}{u}+2,dx=-\frac{1}{u^2}du that gives
\int \frac{1}{(x-2)^3\sqrt{3x^2-8x+5}}\mathrm dx=-\int \frac{u}{\sqrt{3\left(\frac{1}{u}+2\right)^2-8\left(\frac{1}{u}+2\right)+5}}\mathrm du

Is there a useful substitution for u?
 
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gruba said:

Homework Statement


Find the integral \int \frac{1}{(x-2)^3\sqrt{3x^2-8x+5}}\mathrm dx

2. The attempt at a solution
I can't find a useful substitution to solve this integral.
I tried x-2=\frac{1}{u},x=\frac{1}{u}+2,dx=-\frac{1}{u^2}du that gives
\int \frac{1}{(x-2)^3\sqrt{3x^2-8x+5}}\mathrm dx=-\int \frac{u}{\sqrt{3\left(\frac{1}{u}+2\right)^2-8\left(\frac{1}{u}+2\right)+5}}\mathrm du

Is there a useful substitution for u?
Factor ##\ 3x^2-8x+5\ ##. Then putting your u substitution into that simplifies things a bit.
 
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