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Advanced Graphing app sometimes fails to find POI
11-21-2021, 07:35 PM (This post was last modified: 11-25-2021 04:02 AM by Wes Loewer.)
Post: #1
Advanced Graphing app sometimes fails to find POI
I noticed that the Advanced Graphing app fails to find extrema and inflections in the fairly basic function:

Y=e^(-X)*(X+3) or its inverse.

However, Y=2^(-X)*(X+3) and Y=3^(-X)*(X+3) work fine.

It seems to be an integer verses decimal issue as Y=2.001^(-X)*(X+3) also fails.
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11-22-2021, 06:05 PM
Post: #2
RE: Advanced Graphing app sometimes fails to find POI
You may be right on that because:

Y=((419314/154257))^(-X)*(X+3)

works.

-road
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11-22-2021, 08:30 PM
Post: #3
RE: Advanced Graphing app sometimes fails to find POI
Thanks, Wes. We will look into this.

Product Manager HP for MORAVIA Consulting, the EMEA & AP Licensee for HP Calculators.

http://www.hpcalcs.com
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11-23-2021, 03:18 PM
Post: #4
RE: Advanced Graphing app sometimes fails to find POI
(11-22-2021 08:30 PM)KlaasKuperus Wrote:  Thanks, Wes. We will look into this.

The bug seems to have been introduced early on in the firmware.

beta version 2013-11-20 (rev 5410) worked
beta version 2013-11-22 (rev 5440) fails
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