A case against the x<>y key

[hansklav]

(05-11-2015 03:23 AM)Thomas Klemm Wrote:  

(05-11-2015 12:09 AM)hansklav Wrote:  One method is to look carefully to the structure of the calculation to see if doing things backwards can be avoided at all. That is Thomas Klemm’s strategy.

Not sure what you refer to. I just pointed out that \(-9^{2^3}\) is equal to \(-(9^{2^3})\) and not \((-9)^{2^3}\). The fact that Mark corrected the superfluous ENTER but not the false position of CHS irritates me a little.

I referred to you writing:

(05-10-2015 12:49 PM)Thomas Radtke Wrote:  (…) You can evaluate from right to left until the first two terms 1-2*3^4/5, which have to be .calculated befor adding the sum of the two rightmost terms.

1688... in x, then [3][ENTER][4][y^x][5][/][2][*][1][x<>y][-][+]

Fits a 4-level stack perfectly.

That’s a sound way to do the calculation.

Hans