HP-15C display flashes 'Error 8' when it should not?

HP-15C display flashes 'Error 8' when it should not? - Printable Version

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HP-15C display flashes 'Error 8' when it should not? - Marcio - 06-29-2016 01:15 AM

Hello,

I noticed the 15C will flash the display if asked to find a root for the following equation, where R0 is a known and previously determined root:
\[\frac{2^x+2x-\pi}{x-R0}\]

This is the code I used:

Code:

LBL A

2

x<>y

y^x

x<>y

2

*

+

pi

-

x<>y

RCL R0

-

/

RTN

R0 \(\approx 0.737\) with FIX or SCI 3. Ask the calculator to solve again (I used 1 and 5 as guesses) and the display will flash with ERROR 8. Press return once to clear the display and a large number (although within the overflow bounds) will also flash. Press return again and it will stop flashing.

Searching the archives, I found this thread by Dave Britten in which he reported a bug in the 15C LE for similar reasons. Interestingly enough, I can not reproduce this on the 15C emulator for android by HP.

Is this a bug too or did I miss something?

Thanks