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 Solve this equation for x
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 Return to top of page · Post #: 16 · Written at 2:00:52 PM on 11 January 2015.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6687

The formula was presented properly in the text. The problem was my misinterpretation of it.
 
 Return to top of page · Post #: 17 · Written at 9:52:51 AM on 19 January 2015.
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 Maven
 Location: Canberra, ACT
 Member since 23 August 2012
 Member #: 1208
 Postcount: 584

I'm no mathematician, but I wouldn't trust Excel with an equation of that complexity if looking for a precise result. It has built-in rounding factors that can compound through progressive stages of an equation.

Maven
 
 Return to top of page · Post #: 18 · Written at 12:23:23 PM on 19 January 2015.
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 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6687

After Ian pointed out my error of interpretation, Excel did return the correct answer to 2 decimal places. However, at one point I did have in the back of my mind the infamous Intel Pentium floating point bug of the 1990s:

http://en.wikipedia.org/wiki/Pentium_FDIV_bug
 
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