How Do Complex Plane Transformations Affect Equations?

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SUMMARY

The discussion centers on the impact of complex plane transformations on equations, specifically addressing a problem involving the relationship between variables u and v. A participant expresses confusion regarding the solution for part b, questioning the assertion that if x = 4, then u/(u^2 + v^2) equals 4. The consensus indicates that the correct interpretation of the equation is indeed 4, confirming the accuracy of the solution provided.

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Above is the problem and given solution. I am unable to understand the solution for part b - if x =4 then surely u/(u^2 + v^2) =4. Can someone please clarify this.

Thanks in advance.
 
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Typo is the only thing that comes to mind.

I think it should be 4.
 

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