HP-35 x^y key « Next Oldest | Next Newest »

 ▼ Antonio Maschio (Italy) Senior Member Posts: 416 Threads: 78 Joined: Mar 2006 02-18-2009, 10:22 AM Hi, just a curiosity... In the HP-35 calculator page (the first pocket calculator), I read it had a x^y key instead of the modern y^x; my question is perhaps silly, but I have not a HP-35 to play with, so if one of you can explain me... to get, say 2^5 on my HP-12C I type 2 ENTER 5 y^x; what have I to type on a HP-35 to perform the same operation? I believe that, according to the x^y symbols, I should type 5 ENTER 2 x^y: is it correct? Thanks! -- Antonio ▼ Ignazio Cara (Italy) Member Posts: 182 Threads: 21 Joined: Apr 2006 02-18-2009, 11:13 AM Oh yes Antonio, this is correct on every HP-35, with red-dot or without. Regards from Sardinia. Ciao Ignazio Arnaud Amiel Senior Member Posts: 362 Threads: 30 Joined: Jul 2005 02-18-2009, 11:18 AM The 35 does not have a 10^x key either so the x^y helped there. I still much prefer the 45 to the 35. Arnaud Karl Schneider Posting Freak Posts: 1,792 Threads: 62 Joined: Jan 2005 02-19-2009, 03:10 AM Hi, Antonio -- The topic of the x^y key on the old HP-35 came up several years ago, but I didn't bookmark the thread. It's possible that "x raised to the y" with y residing above x in the stack was the rationale for the convention. However, I believe that the real reason for x^y instead of y^x is absence of a 10^x key, as Arnaud mentioned. 10 x^y will easily compute the antilogarithm of a result. Especially when "-" computes y-x and "/" computes y/x, y^x is the natural definition. -- KS

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