RE: Root of the problem

["Gray, Gabriel" <Gabriel.Gray@xxxxxxxxxxxxxxxxx>]

Just use logs. For example, to solve for Z:

logX=logY+a*logZ+blogV+ClogW
logZ=(blogV+ClogW+logY - logX)/a
Z=EXP((blogV+ClogW+logY - logX)/a)

So the EZ language would be:
Z=power((b*log(V)+C*log(W)+log(Y) - log(X))/a ,2.71828);

-----Original Message-----
From: Ian Waugh [mailto:ianwaugh@xxxxxxxxx] 
Sent: Friday, August 20, 2004 12:53 PM
To: omega-list@xxxxxxxxxx
Cc: ianwaugh@xxxxxxxxx
Subject: Root of the problem


Hi All,
      Anyone here good at sums? Yep, I know a lot of you are (:-). 
Wonder if someone can help.

I'm wanting to solve equations that go like this:

X = Y * Z^a * V^b * W^c

The known values are X and Y, the 'powers' - a, b and c - and all but 
one of the Z, V or W values. In other words, I'd like some formulae that

solve:

Z =
V =
W =

where all the values but the one in question are known. Does that make 
sense? The 'powers' aren't straightforward but have values like 0.321, 
0.012 and so on.

And I'd like to be able to do it in TS 2000i and plot the resulting 
values,

I'm a real klutz at this sort of stuff so if anyone can help I'd really 
appreciate a few lines of TS code rather than just the formula.

Thanks.

All the best,
Ian