How was the integral of x^{-1/2}*(1-x)^-1 derived?

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Homework Help Overview

The discussion revolves around the derivation of the integral of the function \( \frac{1}{\sqrt{x}(1-x)} \). Participants are exploring various methods to arrive at the expression \( \log{\frac{1+\sqrt{x}}{1-\sqrt{x}}} \).

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to derive the integral but finds integration by parts and substitution ineffective. Another participant suggests a substitution of \( x = u^2 \) and proposes using partial fraction decomposition. A third participant offers a different approach involving rewriting the integrand and applying a u substitution along with partial fractions.

Discussion Status

The discussion is ongoing, with multiple approaches being explored. Participants are sharing ideas and suggestions without reaching a consensus on a single method. There is a collaborative effort to find a viable path forward.

Contextual Notes

Participants are working within the constraints of typical homework rules, which may limit the types of solutions or methods they can employ. The original poster expresses difficulty with standard techniques, indicating a need for alternative strategies.

imurme8
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Claim: [itex]\int\frac{dx}{\sqrt{x}(1-x)}=\log{\frac{1+\sqrt{x}}{1-\sqrt{x}}}[/itex]
Derivation confirms this, but how was this answer arrived at? IBP seems not to work, can't find a good u-substitution...
 
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What about the substitution [itex]x=u^2[/itex], followed by partial fraction decomposition?
 
Try writing:

[tex]\frac{1}{\sqrt{x}(1-x)} = \frac{1}{\sqrt{x}(1+\sqrt{x})(1-\sqrt{x})}[/tex]

then use a u substitution and partial fractions
 
Thanks guys!
 

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