Bug: HP Prime can't do Log's

[Tim Wessman]

(12-14-2015 07:26 PM)carey Wrote:  Amazing!

...

I wonder what Bill Hewlett's reply would have been?

So I guess you are saying every calculator HP has ever made that doesn't compute TAN(ATAN(1)) to be exactly 1 should have been recalled? (I'm pretty sure only the 49/50 in CAS mode would return that btw)

What about 1/3*3? Because none of them will (Again, except for CAS mode).

This has to due with the question of "guard digits". On the TI you actually have extra rounded digits *that are not shown* and hide the error from the user. This is done simply to avoid asking this type of question. The discussion was around the "why is this result not what you expected" and in fact is correct following the same logic used by all previous HP machines.

There are plenty of viable reasons to kick Prime if you were a 48 user - this isn't one of them though.