[Tfug] OT: Python: Fractional Exponents of Negative Numbers

[Chris Niswander]

I think your post is adequately on-topic here,
but if you're interested in Python,
you might do a web search for Tuple:
"Tucson Python Language Enthusiasts" user group.

Charles R. Kiss wrote:
> At the risk of being flamed; I posted this on a python forum and thought 
> I would solicit comments from TFUG since I know there are some great 
> programmers here.
> 
> Because I get a ValueError:
> 
> "Is there a module out there that can approximate a real solution to a 
> function containing a negative number raised to a fractional exponent? 
> For example, solving for m in: C=m**m*((A**(m+1))/B**m), where A and B 
> are known, and of opposite sign, and C is known.
> 
> My understanding is, an iteration is required, such as Newton's Method 
> (that isn't reliable when using complex numbers), but perhaps with some 
> arbitrary precision all fractional exponents containing even numbered 
> denominators can be excluded, so as not to need to import cmath (which 
> is buggy in IDLE), nor have solutions containing complex numbers, since 
> it can be implied that the solution to m lies in fact between two 
> arbitrarily close rational numbers, ie. fractions with odd-numbered 
> denominators??"
> 
> Or: How do I do this???
> 
> Thanks,
> Charles
> 
>