The Four Meanings of "Accurate to 3 Places"

[Joe Horn]

(12-29-2017 10:06 PM)acapde Wrote:  I was comparing the results of my own implementation with the original PPC ROM DF routine (running on a 41 emulator) and the HP48G (→Q function).
If I store ‘3’ in R07 (41/PPC ROM) and use Fixed 3 display on HP48G I get the same result for SQRT(84): 999/109 (producing in fact an error slightly less than .0000138), not the expected 614/67 fraction (row 14) according to the article, I wonder why...

The →Q function in the HP 48 uses the same simplistic continued-fraction algorithm as the DF routine in the PPC ROM. Hence the same outputs.